diff --git a/.github/ISSUE_TEMPLATE.md b/.github/ISSUE_TEMPLATE.md
index 45f8db721..dedc07604 100644
--- a/.github/ISSUE_TEMPLATE.md
+++ b/.github/ISSUE_TEMPLATE.md
@@ -6,8 +6,8 @@
 
 ---
 
-### Make sure you are using the *latest* version: run `youtube-dl --version` and ensure your version is *2017.04.17*. If it's not read [this FAQ entry](https://github.com/rg3/youtube-dl/blob/master/README.md#how-do-i-update-youtube-dl) and update. Issues with outdated version will be rejected.
-- [ ] I've **verified** and **I assure** that I'm running youtube-dl **2017.04.17**
+### Make sure you are using the *latest* version: run `youtube-dl --version` and ensure your version is *2017.04.26*. If it's not read [this FAQ entry](https://github.com/rg3/youtube-dl/blob/master/README.md#how-do-i-update-youtube-dl) and update. Issues with outdated version will be rejected.
+- [ ] I've **verified** and **I assure** that I'm running youtube-dl **2017.04.26**
 
 ### Before submitting an *issue* make sure you have:
 - [ ] At least skimmed through [README](https://github.com/rg3/youtube-dl/blob/master/README.md) and **most notably** [FAQ](https://github.com/rg3/youtube-dl#faq) and [BUGS](https://github.com/rg3/youtube-dl#bugs) sections
@@ -35,7 +35,7 @@ $ youtube-dl -v <your command line>
 [debug] User config: []
 [debug] Command-line args: [u'-v', u'http://www.youtube.com/watch?v=BaW_jenozKcj']
 [debug] Encodings: locale cp1251, fs mbcs, out cp866, pref cp1251
-[debug] youtube-dl version 2017.04.17
+[debug] youtube-dl version 2017.04.26
 [debug] Python version 2.7.11 - Windows-2003Server-5.2.3790-SP2
 [debug] exe versions: ffmpeg N-75573-g1d0487f, ffprobe N-75573-g1d0487f, rtmpdump 2.4
 [debug] Proxy map: {}
diff --git a/.gitignore b/.gitignore
index 9ce4b5e2d..a5b585f43 100644
--- a/.gitignore
+++ b/.gitignore
@@ -35,8 +35,8 @@ updates_key.pem
 *.mkv
 *.swf
 *.part
+*.ytdl
 *.swp
-test/testdata
 test/local_parameters.json
 .tox
 youtube-dl.zsh
diff --git a/ChangeLog b/ChangeLog
index 03ef0363b..b23aa10d5 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,47 @@
+version 2017.04.26
+
+Core
+* Introduce --keep-fragments for keeping fragments of fragmented download
+  on disk after download is finished
+* [YoutubeDL] Fix output template for missing timestamp (#12796)
+* [socks] Handle cases where credentials are required but missing
+* [extractor/common] Improve HLS extraction (#12211)
+    - Extract m3u8 parsing to separate method
+    - Improve rendition groups extraction
+    - Build stream name according stream GROUP-ID
+    - Ignore reference to AUDIO group without URI when stream has no CODECS
+    - Use float for scaled tbr in _parse_m3u8_formats
+* [utils] Add support for TTML styles in dfxp2srt
+* [downloader/hls] No need to download keys for fragments that have been
+  already downloaded
+* [downloader/fragment] Improve fragment downloading
+    - Resume immediately
+    - Don't concatenate fragments and decrypt them on every resume
+    - Optimize disk storage usage, don't store intermediate fragments on disk
+    - Store bookkeeping download state file
++ [extractor/common] Add support for multiple getters in try_get
++ [extractor/common] Add support for video of WebPage context in _json_ld
+  (#12778)
++ [extractor/common] Relax JWPlayer regular expression and remove
+  duplicate URLs (#12768)
+
+Extractors
+* [iqiyi] Fix extraction of Yule videos
+* [vidio] Improve extraction and sort formats
++ [brightcove] Match only video elements with data-video-id attribute
+* [iqiyi] Fix playlist detection (#12504)
+- [azubu] Remove extractor (#12813)
+* [porn91] Fix extraction (#12814)
+* [vidzi] Fix extraction (#12793)
++ [amp] Extract error message (#12795)
++ [xfileshare] Add support for gorillavid.com and daclips.com (#12776)
+* [instagram] Fix extraction (#12777)
++ [generic] Support Brightcove videos in <iframe> (#12482)
++ [brightcove] Support URLs with bcpid instead of playerID (#12482)
+* [brightcove] Fix _extract_url (#12782)
++ [odnoklassniki] Extract HLS formats
+
+
 version 2017.04.17
 
 Extractors
diff --git a/Makefile b/Makefile
index 9d1ddc9d1..023556391 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,7 @@
 all: youtube-dl README.md CONTRIBUTING.md README.txt youtube-dl.1 youtube-dl.bash-completion youtube-dl.zsh youtube-dl.fish supportedsites
 
 clean:
-	rm -rf youtube-dl.1.temp.md youtube-dl.1 youtube-dl.bash-completion README.txt MANIFEST build/ dist/ .coverage cover/ youtube-dl.tar.gz youtube-dl.zsh youtube-dl.fish youtube_dl/extractor/lazy_extractors.py *.dump *.part* *.info.json *.mp4 *.m4a *.flv *.mp3 *.avi *.mkv *.webm *.3gp *.wav *.ape *.swf *.jpg *.png CONTRIBUTING.md.tmp ISSUE_TEMPLATE.md.tmp youtube-dl youtube-dl.exe
+	rm -rf youtube-dl.1.temp.md youtube-dl.1 youtube-dl.bash-completion README.txt MANIFEST build/ dist/ .coverage cover/ youtube-dl.tar.gz youtube-dl.zsh youtube-dl.fish youtube_dl/extractor/lazy_extractors.py *.dump *.part* *.ytdl *.info.json *.mp4 *.m4a *.flv *.mp3 *.avi *.mkv *.webm *.3gp *.wav *.ape *.swf *.jpg *.png CONTRIBUTING.md.tmp ISSUE_TEMPLATE.md.tmp youtube-dl youtube-dl.exe
 	find . -name "*.pyc" -delete
 	find . -name "*.class" -delete
 
diff --git a/README.md b/README.md
index 41f647aaa..1ecd2005a 100644
--- a/README.md
+++ b/README.md
@@ -187,6 +187,9 @@ Alternatively, refer to the [developer instructions](#developer-instructions) fo
                                      and ISM)
     --abort-on-unavailable-fragment  Abort downloading when some fragment is not
                                      available
+    --keep-fragments                 Keep downloaded fragments on disk after
+                                     downloading is finished; fragments are
+                                     erased by default
     --buffer-size SIZE               Size of download buffer (e.g. 1024 or 16K)
                                      (default is 1024)
     --no-resize-buffer               Do not automatically adjust the buffer
diff --git a/docs/supportedsites.md b/docs/supportedsites.md
index afae82214..0be7af8c4 100644
--- a/docs/supportedsites.md
+++ b/docs/supportedsites.md
@@ -81,8 +81,6 @@
  - **AZMedien**: AZ Medien videos
  - **AZMedienPlaylist**: AZ Medien playlists
  - **AZMedienShowPlaylist**: AZ Medien show playlists
- - **Azubu**
- - **AzubuLive**
  - **BaiduVideo**: 百度视频
  - **bambuser**
  - **bambuser:channel**
diff --git a/test/test_InfoExtractor.py b/test/test_InfoExtractor.py
index 881197afb..2a3c3f7cb 100644
--- a/test/test_InfoExtractor.py
+++ b/test/test_InfoExtractor.py
@@ -3,12 +3,13 @@
 from __future__ import unicode_literals
 
 # Allow direct execution
+import io
 import os
 import sys
 import unittest
 sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
 
-from test.helper import FakeYDL, expect_dict
+from test.helper import FakeYDL, expect_dict, expect_value
 from youtube_dl.extractor.common import InfoExtractor
 from youtube_dl.extractor import YoutubeIE, get_info_extractor
 from youtube_dl.utils import encode_data_uri, strip_jsonp, ExtractorError, RegexNotFoundError
@@ -175,6 +176,354 @@ jwplayer("mediaplayer").setup({"abouttext":"Visit Indie DB","aboutlink":"http:\/
                 }]
             })
 
+    def test_parse_m3u8_formats(self):
+        _TEST_CASES = [
+            (
+                # https://github.com/rg3/youtube-dl/issues/11507
+                # http://pluzz.francetv.fr/videos/le_ministere.html
+                'pluzz_francetv_11507',
+                'http://replayftv-vh.akamaihd.net/i/streaming-adaptatif_france-dom-tom/2017/S16/J2/156589847-58f59130c1f52-,standard1,standard2,standard3,standard4,standard5,.mp4.csmil/master.m3u8?caption=2017%2F16%2F156589847-1492488987.m3u8%3Afra%3AFrancais&audiotrack=0%3Afra%3AFrancais',
+                [{
+                    'url': 'http://replayftv-vh.akamaihd.net/i/streaming-adaptatif_france-dom-tom/2017/S16/J2/156589847-58f59130c1f52-,standard1,standard2,standard3,standard4,standard5,.mp4.csmil/master.m3u8?caption=2017%2F16%2F156589847-1492488987.m3u8%3Afra%3AFrancais&audiotrack=0%3Afra%3AFrancais',
+                    'ext': 'mp4',
+                    'format_id': 'meta',
+                    'format_note': 'Quality selection URL',
+                    'protocol': 'm3u8',
+                    'preference': -100,
+                    'resolution': 'multiple'
+                }, {
+                    'url': 'http://replayftv-vh.akamaihd.net/i/streaming-adaptatif_france-dom-tom/2017/S16/J2/156589847-58f59130c1f52-,standard1,standard2,standard3,standard4,standard5,.mp4.csmil/index_0_av.m3u8?null=0',
+                    'manifest_url': 'http://replayftv-vh.akamaihd.net/i/streaming-adaptatif_france-dom-tom/2017/S16/J2/156589847-58f59130c1f52-,standard1,standard2,standard3,standard4,standard5,.mp4.csmil/index_0_av.m3u8?null=0',
+                    'ext': 'mp4',
+                    'format_id': '180',
+                    'protocol': 'm3u8',
+                    'acodec': 'mp4a.40.2',
+                    'vcodec': 'avc1.66.30',
+                    'tbr': 180,
+                    'width': 256,
+                    'height': 144,
+                }, {
+                    'url': 'http://replayftv-vh.akamaihd.net/i/streaming-adaptatif_france-dom-tom/2017/S16/J2/156589847-58f59130c1f52-,standard1,standard2,standard3,standard4,standard5,.mp4.csmil/index_1_av.m3u8?null=0',
+                    'manifest_url': 'http://replayftv-vh.akamaihd.net/i/streaming-adaptatif_france-dom-tom/2017/S16/J2/156589847-58f59130c1f52-,standard1,standard2,standard3,standard4,standard5,.mp4.csmil/index_1_av.m3u8?null=0',
+                    'ext': 'mp4',
+                    'format_id': '303',
+                    'protocol': 'm3u8',
+                    'acodec': 'mp4a.40.2',
+                    'vcodec': 'avc1.66.30',
+                    'tbr': 303,
+                    'width': 320,
+                    'height': 180,
+                }, {
+                    'url': 'http://replayftv-vh.akamaihd.net/i/streaming-adaptatif_france-dom-tom/2017/S16/J2/156589847-58f59130c1f52-,standard1,standard2,standard3,standard4,standard5,.mp4.csmil/index_2_av.m3u8?null=0',
+                    'manifest_url': 'http://replayftv-vh.akamaihd.net/i/streaming-adaptatif_france-dom-tom/2017/S16/J2/156589847-58f59130c1f52-,standard1,standard2,standard3,standard4,standard5,.mp4.csmil/index_2_av.m3u8?null=0',
+                    'ext': 'mp4',
+                    'format_id': '575',
+                    'protocol': 'm3u8',
+                    'acodec': 'mp4a.40.2',
+                    'vcodec': 'avc1.66.30',
+                    'tbr': 575,
+                    'width': 512,
+                    'height': 288,
+                }, {
+                    'url': 'http://replayftv-vh.akamaihd.net/i/streaming-adaptatif_france-dom-tom/2017/S16/J2/156589847-58f59130c1f52-,standard1,standard2,standard3,standard4,standard5,.mp4.csmil/index_3_av.m3u8?null=0',
+                    'manifest_url': 'http://replayftv-vh.akamaihd.net/i/streaming-adaptatif_france-dom-tom/2017/S16/J2/156589847-58f59130c1f52-,standard1,standard2,standard3,standard4,standard5,.mp4.csmil/index_3_av.m3u8?null=0',
+                    'ext': 'mp4',
+                    'format_id': '831',
+                    'protocol': 'm3u8',
+                    'acodec': 'mp4a.40.2',
+                    'vcodec': 'avc1.77.30',
+                    'tbr': 831,
+                    'width': 704,
+                    'height': 396,
+                }, {
+                    'url': 'http://replayftv-vh.akamaihd.net/i/streaming-adaptatif_france-dom-tom/2017/S16/J2/156589847-58f59130c1f52-,standard1,standard2,standard3,standard4,standard5,.mp4.csmil/index_4_av.m3u8?null=0',
+                    'manifest_url': 'http://replayftv-vh.akamaihd.net/i/streaming-adaptatif_france-dom-tom/2017/S16/J2/156589847-58f59130c1f52-,standard1,standard2,standard3,standard4,standard5,.mp4.csmil/index_4_av.m3u8?null=0',
+                    'ext': 'mp4',
+                    'protocol': 'm3u8',
+                    'format_id': '1467',
+                    'acodec': 'mp4a.40.2',
+                    'vcodec': 'avc1.77.30',
+                    'tbr': 1467,
+                    'width': 1024,
+                    'height': 576,
+                }]
+            ),
+            (
+                # https://github.com/rg3/youtube-dl/issues/11995
+                # http://teamcoco.com/video/clueless-gamer-super-bowl-for-honor
+                'teamcoco_11995',
+                'http://ak.storage-w.teamcococdn.com/cdn/2017-02/98599/ed8f/main.m3u8',
+                [{
+                    'url': 'http://ak.storage-w.teamcococdn.com/cdn/2017-02/98599/ed8f/main.m3u8',
+                    'ext': 'mp4',
+                    'format_id': 'meta',
+                    'format_note': 'Quality selection URL',
+                    'protocol': 'm3u8',
+                    'preference': -100,
+                    'resolution': 'multiple',
+                }, {
+                    'url': 'http://ak.storage-w.teamcococdn.com/cdn/2017-02/98599/ed8f/hls/CONAN_020217_Highlight_show-audio-160k_v4.m3u8',
+                    'ext': 'mp4',
+                    'format_id': 'audio-0-Default',
+                    'protocol': 'm3u8',
+                    'vcodec': 'none',
+                }, {
+                    'url': 'http://ak.storage-w.teamcococdn.com/cdn/2017-02/98599/ed8f/hls/CONAN_020217_Highlight_show-audio-64k_v4.m3u8',
+                    'ext': 'mp4',
+                    'format_id': 'audio-1-Default',
+                    'protocol': 'm3u8',
+                    'vcodec': 'none',
+                }, {
+                    'url': 'http://ak.storage-w.teamcococdn.com/cdn/2017-02/98599/ed8f/hls/CONAN_020217_Highlight_show-audio-64k_v4.m3u8',
+                    'manifest_url': 'http://ak.storage-w.teamcococdn.com/cdn/2017-02/98599/ed8f/hls/CONAN_020217_Highlight_show-audio-64k_v4.m3u8',
+                    'ext': 'mp4',
+                    'format_id': '71',
+                    'protocol': 'm3u8',
+                    'acodec': 'mp4a.40.5',
+                    'vcodec': 'none',
+                    'tbr': 71,
+                }, {
+                    'url': 'http://ak.storage-w.teamcococdn.com/cdn/2017-02/98599/ed8f/hls/CONAN_020217_Highlight_show-400k_v4.m3u8',
+                    'manifest_url': 'http://ak.storage-w.teamcococdn.com/cdn/2017-02/98599/ed8f/hls/CONAN_020217_Highlight_show-400k_v4.m3u8',
+                    'ext': 'mp4',
+                    'format_id': '413',
+                    'protocol': 'm3u8',
+                    'acodec': 'none',
+                    'vcodec': 'avc1.42001e',
+                    'tbr': 413,
+                    'width': 400,
+                    'height': 224,
+                }, {
+                    'url': 'http://ak.storage-w.teamcococdn.com/cdn/2017-02/98599/ed8f/hls/CONAN_020217_Highlight_show-400k_v4.m3u8',
+                    'manifest_url': 'http://ak.storage-w.teamcococdn.com/cdn/2017-02/98599/ed8f/hls/CONAN_020217_Highlight_show-400k_v4.m3u8',
+                    'ext': 'mp4',
+                    'format_id': '522',
+                    'protocol': 'm3u8',
+                    'acodec': 'none',
+                    'vcodec': 'avc1.42001e',
+                    'tbr': 522,
+                    'width': 400,
+                    'height': 224,
+                }, {
+                    'url': 'http://ak.storage-w.teamcococdn.com/cdn/2017-02/98599/ed8f/hls/CONAN_020217_Highlight_show-1m_v4.m3u8',
+                    'manifest_url': 'http://ak.storage-w.teamcococdn.com/cdn/2017-02/98599/ed8f/hls/CONAN_020217_Highlight_show-1m_v4.m3u8',
+                    'ext': 'mp4',
+                    'format_id': '1205',
+                    'protocol': 'm3u8',
+                    'acodec': 'none',
+                    'vcodec': 'avc1.4d001e',
+                    'tbr': 1205,
+                    'width': 640,
+                    'height': 360,
+                }, {
+                    'url': 'http://ak.storage-w.teamcococdn.com/cdn/2017-02/98599/ed8f/hls/CONAN_020217_Highlight_show-2m_v4.m3u8',
+                    'manifest_url': 'http://ak.storage-w.teamcococdn.com/cdn/2017-02/98599/ed8f/hls/CONAN_020217_Highlight_show-2m_v4.m3u8',
+                    'ext': 'mp4',
+                    'format_id': '2374',
+                    'protocol': 'm3u8',
+                    'acodec': 'none',
+                    'vcodec': 'avc1.4d001f',
+                    'tbr': 2374,
+                    'width': 1024,
+                    'height': 576,
+                }]
+            ),
+            (
+                # https://github.com/rg3/youtube-dl/issues/12211
+                # http://video.toggle.sg/en/series/whoopie-s-world/ep3/478601
+                'toggle_mobile_12211',
+                'http://cdnapi.kaltura.com/p/2082311/sp/208231100/playManifest/protocol/http/entryId/0_89q6e8ku/format/applehttp/tags/mobile_sd/f/a.m3u8',
+                [{
+                    'url': 'http://cdnapi.kaltura.com/p/2082311/sp/208231100/playManifest/protocol/http/entryId/0_89q6e8ku/format/applehttp/tags/mobile_sd/f/a.m3u8',
+                    'ext': 'mp4',
+                    'format_id': 'meta',
+                    'format_note': 'Quality selection URL',
+                    'protocol': 'm3u8',
+                    'preference': -100,
+                    'resolution': 'multiple'
+                }, {
+                    'url': 'http://k.toggle.sg/fhls/p/2082311/sp/208231100/serveFlavor/entryId/0_89q6e8ku/v/2/pv/1/flavorId/0_sa2ntrdg/name/a.mp4/index.m3u8',
+                    'ext': 'mp4',
+                    'format_id': 'audio-English',
+                    'protocol': 'm3u8',
+                    'language': 'eng',
+                    'vcodec': 'none',
+                }, {
+                    'url': 'http://k.toggle.sg/fhls/p/2082311/sp/208231100/serveFlavor/entryId/0_89q6e8ku/v/2/pv/1/flavorId/0_r7y0nitg/name/a.mp4/index.m3u8',
+                    'ext': 'mp4',
+                    'format_id': 'audio-Undefined',
+                    'protocol': 'm3u8',
+                    'language': 'und',
+                    'vcodec': 'none',
+                }, {
+                    'url': 'http://k.toggle.sg/fhls/p/2082311/sp/208231100/serveFlavor/entryId/0_89q6e8ku/v/2/pv/1/flavorId/0_qlk9hlzr/name/a.mp4/index.m3u8',
+                    'manifest_url': 'http://k.toggle.sg/fhls/p/2082311/sp/208231100/serveFlavor/entryId/0_89q6e8ku/v/2/pv/1/flavorId/0_qlk9hlzr/name/a.mp4/index.m3u8',
+                    'ext': 'mp4',
+                    'format_id': '155',
+                    'protocol': 'm3u8',
+                    'tbr': 155.648,
+                    'width': 320,
+                    'height': 180,
+                }, {
+                    'url': 'http://k.toggle.sg/fhls/p/2082311/sp/208231100/serveFlavor/entryId/0_89q6e8ku/v/2/pv/1/flavorId/0_oefackmi/name/a.mp4/index.m3u8',
+                    'manifest_url': 'http://k.toggle.sg/fhls/p/2082311/sp/208231100/serveFlavor/entryId/0_89q6e8ku/v/2/pv/1/flavorId/0_oefackmi/name/a.mp4/index.m3u8',
+                    'ext': 'mp4',
+                    'format_id': '502',
+                    'protocol': 'm3u8',
+                    'tbr': 502.784,
+                    'width': 480,
+                    'height': 270,
+                }, {
+                    'url': 'http://k.toggle.sg/fhls/p/2082311/sp/208231100/serveFlavor/entryId/0_89q6e8ku/v/12/pv/1/flavorId/0_vyg9pj7k/name/a.mp4/index.m3u8',
+                    'manifest_url': 'http://k.toggle.sg/fhls/p/2082311/sp/208231100/serveFlavor/entryId/0_89q6e8ku/v/12/pv/1/flavorId/0_vyg9pj7k/name/a.mp4/index.m3u8',
+                    'ext': 'mp4',
+                    'format_id': '827',
+                    'protocol': 'm3u8',
+                    'tbr': 827.392,
+                    'width': 640,
+                    'height': 360,
+                }, {
+                    'url': 'http://k.toggle.sg/fhls/p/2082311/sp/208231100/serveFlavor/entryId/0_89q6e8ku/v/12/pv/1/flavorId/0_50n4psvx/name/a.mp4/index.m3u8',
+                    'manifest_url': 'http://k.toggle.sg/fhls/p/2082311/sp/208231100/serveFlavor/entryId/0_89q6e8ku/v/12/pv/1/flavorId/0_50n4psvx/name/a.mp4/index.m3u8',
+                    'ext': 'mp4',
+                    'format_id': '1396',
+                    'protocol': 'm3u8',
+                    'tbr': 1396.736,
+                    'width': 854,
+                    'height': 480,
+                }]
+            ),
+            (
+                # http://www.twitch.tv/riotgames/v/6528877
+                'twitch_vod',
+                'https://usher.ttvnw.net/vod/6528877?allow_source=true&allow_audio_only=true&allow_spectre=true&player=twitchweb&nauth=%7B%22user_id%22%3Anull%2C%22vod_id%22%3A6528877%2C%22expires%22%3A1492887874%2C%22chansub%22%3A%7B%22restricted_bitrates%22%3A%5B%5D%7D%2C%22privileged%22%3Afalse%2C%22https_required%22%3Afalse%7D&nauthsig=3e29296a6824a0f48f9e731383f77a614fc79bee',
+                [{
+                    'url': 'https://usher.ttvnw.net/vod/6528877?allow_source=true&allow_audio_only=true&allow_spectre=true&player=twitchweb&nauth=%7B%22user_id%22%3Anull%2C%22vod_id%22%3A6528877%2C%22expires%22%3A1492887874%2C%22chansub%22%3A%7B%22restricted_bitrates%22%3A%5B%5D%7D%2C%22privileged%22%3Afalse%2C%22https_required%22%3Afalse%7D&nauthsig=3e29296a6824a0f48f9e731383f77a614fc79bee',
+                    'ext': 'mp4',
+                    'format_id': 'meta',
+                    'format_note': 'Quality selection URL',
+                    'protocol': 'm3u8',
+                    'preference': -100,
+                    'resolution': 'multiple'
+                }, {
+                    'url': 'https://vod.edgecast.hls.ttvnw.net/e5da31ab49_riotgames_15001215120_261543898/audio_only/index-muted-HM49I092CC.m3u8',
+                    'manifest_url': 'https://vod.edgecast.hls.ttvnw.net/e5da31ab49_riotgames_15001215120_261543898/audio_only/index-muted-HM49I092CC.m3u8',
+                    'ext': 'mp4',
+                    'format_id': 'Audio Only',
+                    'protocol': 'm3u8',
+                    'acodec': 'mp4a.40.2',
+                    'vcodec': 'none',
+                    'tbr': 182.725,
+                }, {
+                    'url': 'https://vod.edgecast.hls.ttvnw.net/e5da31ab49_riotgames_15001215120_261543898/mobile/index-muted-HM49I092CC.m3u8',
+                    'manifest_url': 'https://vod.edgecast.hls.ttvnw.net/e5da31ab49_riotgames_15001215120_261543898/mobile/index-muted-HM49I092CC.m3u8',
+                    'ext': 'mp4',
+                    'format_id': 'Mobile',
+                    'protocol': 'm3u8',
+                    'acodec': 'mp4a.40.2',
+                    'vcodec': 'avc1.42C00D',
+                    'tbr': 280.474,
+                    'width': 400,
+                    'height': 226,
+                }, {
+                    'url': 'https://vod.edgecast.hls.ttvnw.net/e5da31ab49_riotgames_15001215120_261543898/low/index-muted-HM49I092CC.m3u8',
+                    'manifest_url': 'https://vod.edgecast.hls.ttvnw.net/e5da31ab49_riotgames_15001215120_261543898/low/index-muted-HM49I092CC.m3u8',
+                    'ext': 'mp4',
+                    'format_id': 'Low',
+                    'protocol': 'm3u8',
+                    'acodec': 'mp4a.40.2',
+                    'vcodec': 'avc1.42C01E',
+                    'tbr': 628.347,
+                    'width': 640,
+                    'height': 360,
+                }, {
+                    'url': 'https://vod.edgecast.hls.ttvnw.net/e5da31ab49_riotgames_15001215120_261543898/medium/index-muted-HM49I092CC.m3u8',
+                    'manifest_url': 'https://vod.edgecast.hls.ttvnw.net/e5da31ab49_riotgames_15001215120_261543898/medium/index-muted-HM49I092CC.m3u8',
+                    'ext': 'mp4',
+                    'format_id': 'Medium',
+                    'protocol': 'm3u8',
+                    'acodec': 'mp4a.40.2',
+                    'vcodec': 'avc1.42C01E',
+                    'tbr': 893.387,
+                    'width': 852,
+                    'height': 480,
+                }, {
+                    'url': 'https://vod.edgecast.hls.ttvnw.net/e5da31ab49_riotgames_15001215120_261543898/high/index-muted-HM49I092CC.m3u8',
+                    'manifest_url': 'https://vod.edgecast.hls.ttvnw.net/e5da31ab49_riotgames_15001215120_261543898/high/index-muted-HM49I092CC.m3u8',
+                    'ext': 'mp4',
+                    'format_id': 'High',
+                    'protocol': 'm3u8',
+                    'acodec': 'mp4a.40.2',
+                    'vcodec': 'avc1.42C01F',
+                    'tbr': 1603.789,
+                    'width': 1280,
+                    'height': 720,
+                }, {
+                    'url': 'https://vod.edgecast.hls.ttvnw.net/e5da31ab49_riotgames_15001215120_261543898/chunked/index-muted-HM49I092CC.m3u8',
+                    'manifest_url': 'https://vod.edgecast.hls.ttvnw.net/e5da31ab49_riotgames_15001215120_261543898/chunked/index-muted-HM49I092CC.m3u8',
+                    'ext': 'mp4',
+                    'format_id': 'Source',
+                    'protocol': 'm3u8',
+                    'acodec': 'mp4a.40.2',
+                    'vcodec': 'avc1.100.31',
+                    'tbr': 3214.134,
+                    'width': 1280,
+                    'height': 720,
+                }]
+            ),
+            (
+                # http://www.vidio.com/watch/165683-dj_ambred-booyah-live-2015
+                # EXT-X-STREAM-INF tag with NAME attribute that is not defined
+                # in HLS specification
+                'vidio',
+                'https://www.vidio.com/videos/165683/playlist.m3u8',
+                [{
+                    'url': 'https://www.vidio.com/videos/165683/playlist.m3u8',
+                    'ext': 'mp4',
+                    'format_id': 'meta',
+                    'format_note': 'Quality selection URL',
+                    'protocol': 'm3u8',
+                    'preference': -100,
+                    'resolution': 'multiple'
+                }, {
+                    'url': 'https://cdn1-a.production.vidio.static6.com/uploads/165683/dj_ambred-4383-b300.mp4.m3u8',
+                    'manifest_url': 'https://cdn1-a.production.vidio.static6.com/uploads/165683/dj_ambred-4383-b300.mp4.m3u8',
+                    'ext': 'mp4',
+                    'format_id': '270p 3G',
+                    'protocol': 'm3u8',
+                    'tbr': 300,
+                    'width': 480,
+                    'height': 270,
+                }, {
+                    'url': 'https://cdn1-a.production.vidio.static6.com/uploads/165683/dj_ambred-4383-b600.mp4.m3u8',
+                    'manifest_url': 'https://cdn1-a.production.vidio.static6.com/uploads/165683/dj_ambred-4383-b600.mp4.m3u8',
+                    'ext': 'mp4',
+                    'format_id': '360p SD',
+                    'protocol': 'm3u8',
+                    'tbr': 600,
+                    'width': 640,
+                    'height': 360,
+                }, {
+                    'url': 'https://cdn1-a.production.vidio.static6.com/uploads/165683/dj_ambred-4383-b1200.mp4.m3u8',
+                    'manifest_url': 'https://cdn1-a.production.vidio.static6.com/uploads/165683/dj_ambred-4383-b1200.mp4.m3u8',
+                    'ext': 'mp4',
+                    'format_id': '720p HD',
+                    'protocol': 'm3u8',
+                    'tbr': 1200,
+                    'width': 1280,
+                    'height': 720,
+                }]
+            )
+        ]
+
+        for m3u8_file, m3u8_url, expected_formats in _TEST_CASES:
+            with io.open('./test/testdata/m3u8/%s.m3u8' % m3u8_file,
+                         mode='r', encoding='utf-8') as f:
+                formats = self.ie._parse_m3u8_formats(
+                    f.read(), m3u8_url, ext='mp4')
+                self.ie._sort_formats(formats)
+                expect_value(self, formats, expected_formats, None)
+
 
 if __name__ == '__main__':
     unittest.main()
diff --git a/test/test_utils.py b/test/test_utils.py
index aa4569b81..4cd818850 100644
--- a/test/test_utils.py
+++ b/test/test_utils.py
@@ -1069,6 +1069,47 @@ The first line
 '''
         self.assertEqual(dfxp2srt(dfxp_data_no_default_namespace), srt_data)
 
+        dfxp_data_with_style = '''<?xml version="1.0" encoding="utf-8"?>
+<tt xmlns="http://www.w3.org/2006/10/ttaf1" xmlns:ttp="http://www.w3.org/2006/10/ttaf1#parameter" ttp:timeBase="media" xmlns:tts="http://www.w3.org/2006/10/ttaf1#style" xml:lang="en" xmlns:ttm="http://www.w3.org/2006/10/ttaf1#metadata">
+  <head>
+    <styling>
+      <style id="s2" style="s0" tts:color="cyan" tts:fontWeight="bold" />
+      <style id="s1" style="s0" tts:color="yellow" tts:fontStyle="italic" />
+      <style id="s3" style="s0" tts:color="lime" tts:textDecoration="underline" />
+      <style id="s0" tts:backgroundColor="black" tts:fontStyle="normal" tts:fontSize="16" tts:fontFamily="sansSerif" tts:color="white" />
+    </styling>
+  </head>
+  <body tts:textAlign="center" style="s0">
+    <div>
+      <p begin="00:00:02.08" id="p0" end="00:00:05.84">default style<span tts:color="red">custom style</span></p>
+      <p style="s2" begin="00:00:02.08" id="p0" end="00:00:05.84"><span tts:color="lime">part 1<br /></span><span tts:color="cyan">part 2</span></p>
+      <p style="s3" begin="00:00:05.84" id="p1" end="00:00:09.56">line 3<br />part 3</p>
+      <p style="s1" tts:textDecoration="underline" begin="00:00:09.56" id="p2" end="00:00:12.36"><span style="s2" tts:color="lime">inner<br /> </span>style</p>
+    </div>
+  </body>
+</tt>'''
+        srt_data = '''1
+00:00:02,080 --> 00:00:05,839
+<font color="white" face="sansSerif" size="16">default style<font color="red">custom style</font></font>
+
+2
+00:00:02,080 --> 00:00:05,839
+<b><font color="cyan" face="sansSerif" size="16"><font color="lime">part 1
+</font>part 2</font></b>
+
+3
+00:00:05,839 --> 00:00:09,560
+<u><font color="lime">line 3
+part 3</font></u>
+
+4
+00:00:09,560 --> 00:00:12,359
+<i><u><font color="yellow"><font color="lime">inner
+ </font>style</font></u></i>
+
+'''
+        self.assertEqual(dfxp2srt(dfxp_data_with_style), srt_data)
+
     def test_cli_option(self):
         self.assertEqual(cli_option({'proxy': '127.0.0.1:3128'}, '--proxy', 'proxy'), ['--proxy', '127.0.0.1:3128'])
         self.assertEqual(cli_option({'proxy': None}, '--proxy', 'proxy'), [])
diff --git a/test/testdata/m3u8/pluzz_francetv_11507.m3u8 b/test/testdata/m3u8/pluzz_francetv_11507.m3u8
new file mode 100644
index 000000000..0809f5aa0
--- /dev/null
+++ b/test/testdata/m3u8/pluzz_francetv_11507.m3u8
@@ -0,0 +1,14 @@
+#EXTM3U
+    
#EXT-X-VERSION:5
+    
#EXT-X-MEDIA:TYPE=SUBTITLES,GROUP-ID="subs",NAME="Francais",DEFAULT=NO,FORCED=NO,URI="http://replayftv-pmd.francetv.fr/subtitles/2017/16/156589847-1492488987.m3u8",LANGUAGE="fra"
+    
#EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID="aac",LANGUAGE="fra",NAME="Francais",DEFAULT=YES, AUTOSELECT=YES
+#EXT-X-STREAM-INF:SUBTITLES="subs",AUDIO="aac",PROGRAM-ID=1,BANDWIDTH=180000,RESOLUTION=256x144,CODECS="avc1.66.30, mp4a.40.2"
+http://replayftv-vh.akamaihd.net/i/streaming-adaptatif_france-dom-tom/2017/S16/J2/156589847-58f59130c1f52-,standard1,standard2,standard3,standard4,standard5,.mp4.csmil/index_0_av.m3u8?null=0
+#EXT-X-STREAM-INF:SUBTITLES="subs",AUDIO="aac",PROGRAM-ID=1,BANDWIDTH=303000,RESOLUTION=320x180,CODECS="avc1.66.30, mp4a.40.2"
+http://replayftv-vh.akamaihd.net/i/streaming-adaptatif_france-dom-tom/2017/S16/J2/156589847-58f59130c1f52-,standard1,standard2,standard3,standard4,standard5,.mp4.csmil/index_1_av.m3u8?null=0
+#EXT-X-STREAM-INF:SUBTITLES="subs",AUDIO="aac",PROGRAM-ID=1,BANDWIDTH=575000,RESOLUTION=512x288,CODECS="avc1.66.30, mp4a.40.2"
+http://replayftv-vh.akamaihd.net/i/streaming-adaptatif_france-dom-tom/2017/S16/J2/156589847-58f59130c1f52-,standard1,standard2,standard3,standard4,standard5,.mp4.csmil/index_2_av.m3u8?null=0
+#EXT-X-STREAM-INF:SUBTITLES="subs",AUDIO="aac",PROGRAM-ID=1,BANDWIDTH=831000,RESOLUTION=704x396,CODECS="avc1.77.30, mp4a.40.2"
+http://replayftv-vh.akamaihd.net/i/streaming-adaptatif_france-dom-tom/2017/S16/J2/156589847-58f59130c1f52-,standard1,standard2,standard3,standard4,standard5,.mp4.csmil/index_3_av.m3u8?null=0
+#EXT-X-STREAM-INF:SUBTITLES="subs",AUDIO="aac",PROGRAM-ID=1,BANDWIDTH=1467000,RESOLUTION=1024x576,CODECS="avc1.77.30, mp4a.40.2"
+http://replayftv-vh.akamaihd.net/i/streaming-adaptatif_france-dom-tom/2017/S16/J2/156589847-58f59130c1f52-,standard1,standard2,standard3,standard4,standard5,.mp4.csmil/index_4_av.m3u8?null=0
diff --git a/test/testdata/m3u8/teamcoco_11995.m3u8 b/test/testdata/m3u8/teamcoco_11995.m3u8
new file mode 100644
index 000000000..a6e421697
--- /dev/null
+++ b/test/testdata/m3u8/teamcoco_11995.m3u8
@@ -0,0 +1,16 @@
+#EXTM3U
+#EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID="audio-0",NAME="Default",AUTOSELECT=YES,DEFAULT=YES,URI="hls/CONAN_020217_Highlight_show-audio-160k_v4.m3u8"
+#EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID="audio-1",NAME="Default",AUTOSELECT=YES,DEFAULT=YES,URI="hls/CONAN_020217_Highlight_show-audio-64k_v4.m3u8"
+#EXT-X-I-FRAME-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=37862000,CODECS="avc1.4d001f",URI="hls/CONAN_020217_Highlight_show-2m_iframe.m3u8"
+#EXT-X-I-FRAME-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=18750000,CODECS="avc1.4d001e",URI="hls/CONAN_020217_Highlight_show-1m_iframe.m3u8"
+#EXT-X-I-FRAME-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=6535000,CODECS="avc1.42001e",URI="hls/CONAN_020217_Highlight_show-400k_iframe.m3u8"
+#EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=2374000,RESOLUTION=1024x576,CODECS="avc1.4d001f,mp4a.40.2",AUDIO="audio-0"
+hls/CONAN_020217_Highlight_show-2m_v4.m3u8
+#EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=1205000,RESOLUTION=640x360,CODECS="avc1.4d001e,mp4a.40.2",AUDIO="audio-0"
+hls/CONAN_020217_Highlight_show-1m_v4.m3u8
+#EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=522000,RESOLUTION=400x224,CODECS="avc1.42001e,mp4a.40.2",AUDIO="audio-0"
+hls/CONAN_020217_Highlight_show-400k_v4.m3u8
+#EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=413000,RESOLUTION=400x224,CODECS="avc1.42001e,mp4a.40.5",AUDIO="audio-1"
+hls/CONAN_020217_Highlight_show-400k_v4.m3u8
+#EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=71000,CODECS="mp4a.40.5",AUDIO="audio-1"
+hls/CONAN_020217_Highlight_show-audio-64k_v4.m3u8
diff --git a/test/testdata/m3u8/toggle_mobile_12211.m3u8 b/test/testdata/m3u8/toggle_mobile_12211.m3u8
new file mode 100644
index 000000000..69604e683
--- /dev/null
+++ b/test/testdata/m3u8/toggle_mobile_12211.m3u8
@@ -0,0 +1,13 @@
+#EXTM3U
+#EXT-X-VERSION:4
+#EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID="audio",LANGUAGE="eng",NAME="English",URI="http://k.toggle.sg/fhls/p/2082311/sp/208231100/serveFlavor/entryId/0_89q6e8ku/v/2/pv/1/flavorId/0_sa2ntrdg/name/a.mp4/index.m3u8"
+#EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID="audio",LANGUAGE="und",NAME="Undefined",URI="http://k.toggle.sg/fhls/p/2082311/sp/208231100/serveFlavor/entryId/0_89q6e8ku/v/2/pv/1/flavorId/0_r7y0nitg/name/a.mp4/index.m3u8"
+
+#EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=155648,RESOLUTION=320x180,AUDIO="audio"
+http://k.toggle.sg/fhls/p/2082311/sp/208231100/serveFlavor/entryId/0_89q6e8ku/v/2/pv/1/flavorId/0_qlk9hlzr/name/a.mp4/index.m3u8
+#EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=502784,RESOLUTION=480x270,AUDIO="audio"
+http://k.toggle.sg/fhls/p/2082311/sp/208231100/serveFlavor/entryId/0_89q6e8ku/v/2/pv/1/flavorId/0_oefackmi/name/a.mp4/index.m3u8
+#EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=827392,RESOLUTION=640x360,AUDIO="audio"
+http://k.toggle.sg/fhls/p/2082311/sp/208231100/serveFlavor/entryId/0_89q6e8ku/v/12/pv/1/flavorId/0_vyg9pj7k/name/a.mp4/index.m3u8
+#EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=1396736,RESOLUTION=854x480,AUDIO="audio"
+http://k.toggle.sg/fhls/p/2082311/sp/208231100/serveFlavor/entryId/0_89q6e8ku/v/12/pv/1/flavorId/0_50n4psvx/name/a.mp4/index.m3u8
diff --git a/test/testdata/m3u8/twitch_vod.m3u8 b/test/testdata/m3u8/twitch_vod.m3u8
new file mode 100644
index 000000000..7617277ca
--- /dev/null
+++ b/test/testdata/m3u8/twitch_vod.m3u8
@@ -0,0 +1,20 @@
+#EXTM3U
+#EXT-X-TWITCH-INFO:ORIGIN="s3",CLUSTER="edgecast_vod",REGION="EU",MANIFEST-CLUSTER="edgecast_vod",USER-IP="109.171.17.81"
+#EXT-X-MEDIA:TYPE=VIDEO,GROUP-ID="chunked",NAME="Source",AUTOSELECT=YES,DEFAULT=YES
+#EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=3214134,CODECS="avc1.100.31,mp4a.40.2",RESOLUTION="1280x720",VIDEO="chunked"
+https://vod.edgecast.hls.ttvnw.net/e5da31ab49_riotgames_15001215120_261543898/chunked/index-muted-HM49I092CC.m3u8
+#EXT-X-MEDIA:TYPE=VIDEO,GROUP-ID="high",NAME="High",AUTOSELECT=YES,DEFAULT=YES
+#EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=1603789,CODECS="avc1.42C01F,mp4a.40.2",RESOLUTION="1280x720",VIDEO="high"
+https://vod.edgecast.hls.ttvnw.net/e5da31ab49_riotgames_15001215120_261543898/high/index-muted-HM49I092CC.m3u8
+#EXT-X-MEDIA:TYPE=VIDEO,GROUP-ID="medium",NAME="Medium",AUTOSELECT=YES,DEFAULT=YES
+#EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=893387,CODECS="avc1.42C01E,mp4a.40.2",RESOLUTION="852x480",VIDEO="medium"
+https://vod.edgecast.hls.ttvnw.net/e5da31ab49_riotgames_15001215120_261543898/medium/index-muted-HM49I092CC.m3u8
+#EXT-X-MEDIA:TYPE=VIDEO,GROUP-ID="low",NAME="Low",AUTOSELECT=YES,DEFAULT=YES
+#EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=628347,CODECS="avc1.42C01E,mp4a.40.2",RESOLUTION="640x360",VIDEO="low"
+https://vod.edgecast.hls.ttvnw.net/e5da31ab49_riotgames_15001215120_261543898/low/index-muted-HM49I092CC.m3u8
+#EXT-X-MEDIA:TYPE=VIDEO,GROUP-ID="mobile",NAME="Mobile",AUTOSELECT=YES,DEFAULT=YES
+#EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=280474,CODECS="avc1.42C00D,mp4a.40.2",RESOLUTION="400x226",VIDEO="mobile"
+https://vod.edgecast.hls.ttvnw.net/e5da31ab49_riotgames_15001215120_261543898/mobile/index-muted-HM49I092CC.m3u8
+#EXT-X-MEDIA:TYPE=VIDEO,GROUP-ID="audio_only",NAME="Audio Only",AUTOSELECT=NO,DEFAULT=NO
+#EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=182725,CODECS="mp4a.40.2",VIDEO="audio_only"
+https://vod.edgecast.hls.ttvnw.net/e5da31ab49_riotgames_15001215120_261543898/audio_only/index-muted-HM49I092CC.m3u8
diff --git a/test/testdata/m3u8/vidio.m3u8 b/test/testdata/m3u8/vidio.m3u8
new file mode 100644
index 000000000..89c244469
--- /dev/null
+++ b/test/testdata/m3u8/vidio.m3u8
@@ -0,0 +1,10 @@
+#EXTM3U
+
+#EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=300000,RESOLUTION=480x270,NAME="270p 3G"
+https://cdn1-a.production.vidio.static6.com/uploads/165683/dj_ambred-4383-b300.mp4.m3u8
+
+#EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=600000,RESOLUTION=640x360,NAME="360p SD"
+https://cdn1-a.production.vidio.static6.com/uploads/165683/dj_ambred-4383-b600.mp4.m3u8
+
+#EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=1200000,RESOLUTION=1280x720,NAME="720p HD"
+https://cdn1-a.production.vidio.static6.com/uploads/165683/dj_ambred-4383-b1200.mp4.m3u8
diff --git a/youtube_dl/YoutubeDL.py b/youtube_dl/YoutubeDL.py
index 819b374ef..eb465c425 100755
--- a/youtube_dl/YoutubeDL.py
+++ b/youtube_dl/YoutubeDL.py
@@ -640,7 +640,7 @@ class YoutubeDL(object):
 
             NUMERIC_FIELDS = set((
                 'width', 'height', 'tbr', 'abr', 'asr', 'vbr', 'fps', 'filesize', 'filesize_approx',
-                'upload_year', 'upload_month', 'upload_day',
+                'timestamp', 'upload_year', 'upload_month', 'upload_day',
                 'duration', 'view_count', 'like_count', 'dislike_count', 'repost_count',
                 'average_rating', 'comment_count', 'age_limit',
                 'start_time', 'end_time',
diff --git a/youtube_dl/__init__.py b/youtube_dl/__init__.py
index f15606568..c4589411e 100644
--- a/youtube_dl/__init__.py
+++ b/youtube_dl/__init__.py
@@ -343,6 +343,7 @@ def _real_main(argv=None):
         'retries': opts.retries,
         'fragment_retries': opts.fragment_retries,
         'skip_unavailable_fragments': opts.skip_unavailable_fragments,
+        'keep_fragments': opts.keep_fragments,
         'buffersize': opts.buffersize,
         'noresizebuffer': opts.noresizebuffer,
         'continuedl': opts.continue_dl,
diff --git a/youtube_dl/downloader/common.py b/youtube_dl/downloader/common.py
index 2c4470a95..5d6621147 100644
--- a/youtube_dl/downloader/common.py
+++ b/youtube_dl/downloader/common.py
@@ -187,6 +187,9 @@ class FileDownloader(object):
             return filename[:-len('.part')]
         return filename
 
+    def ytdl_filename(self, filename):
+        return filename + '.ytdl'
+
     def try_rename(self, old_filename, new_filename):
         try:
             if old_filename == new_filename:
@@ -327,21 +330,22 @@ class FileDownloader(object):
             os.path.exists(encodeFilename(filename))
         )
 
-        continuedl_and_exists = (
-            self.params.get('continuedl', True) and
-            os.path.isfile(encodeFilename(filename)) and
-            not self.params.get('nopart', False)
-        )
+        if not hasattr(filename, 'write'):
+            continuedl_and_exists = (
+                self.params.get('continuedl', True) and
+                os.path.isfile(encodeFilename(filename)) and
+                not self.params.get('nopart', False)
+            )
 
-        # Check file already present
-        if filename != '-' and (nooverwrites_and_exists or continuedl_and_exists):
-            self.report_file_already_downloaded(filename)
-            self._hook_progress({
-                'filename': filename,
-                'status': 'finished',
-                'total_bytes': os.path.getsize(encodeFilename(filename)),
-            })
-            return True
+            # Check file already present
+            if filename != '-' and (nooverwrites_and_exists or continuedl_and_exists):
+                self.report_file_already_downloaded(filename)
+                self._hook_progress({
+                    'filename': filename,
+                    'status': 'finished',
+                    'total_bytes': os.path.getsize(encodeFilename(filename)),
+                })
+                return True
 
         min_sleep_interval = self.params.get('sleep_interval')
         if min_sleep_interval:
diff --git a/youtube_dl/downloader/dash.py b/youtube_dl/downloader/dash.py
index e2ddc369e..7491fdad8 100644
--- a/youtube_dl/downloader/dash.py
+++ b/youtube_dl/downloader/dash.py
@@ -1,13 +1,7 @@
 from __future__ import unicode_literals
 
-import os
-
 from .fragment import FragmentFD
 from ..compat import compat_urllib_error
-from ..utils import (
-    sanitize_open,
-    encodeFilename,
-)
 
 
 class DashSegmentsFD(FragmentFD):
@@ -28,31 +22,24 @@ class DashSegmentsFD(FragmentFD):
 
         self._prepare_and_start_frag_download(ctx)
 
-        segments_filenames = []
-
         fragment_retries = self.params.get('fragment_retries', 0)
         skip_unavailable_fragments = self.params.get('skip_unavailable_fragments', True)
 
-        def process_segment(segment, tmp_filename, num):
-            segment_url = segment['url']
-            segment_name = 'Frag%d' % num
-            target_filename = '%s-%s' % (tmp_filename, segment_name)
+        frag_index = 0
+        for i, segment in enumerate(segments):
+            frag_index += 1
+            if frag_index <= ctx['fragment_index']:
+                continue
             # In DASH, the first segment contains necessary headers to
             # generate a valid MP4 file, so always abort for the first segment
-            fatal = num == 0 or not skip_unavailable_fragments
+            fatal = i == 0 or not skip_unavailable_fragments
             count = 0
             while count <= fragment_retries:
                 try:
-                    success = ctx['dl'].download(target_filename, {
-                        'url': segment_url,
-                        'http_headers': info_dict.get('http_headers'),
-                    })
+                    success, frag_content = self._download_fragment(ctx, segment['url'], info_dict)
                     if not success:
                         return False
-                    down, target_sanitized = sanitize_open(target_filename, 'rb')
-                    ctx['dest_stream'].write(down.read())
-                    down.close()
-                    segments_filenames.append(target_sanitized)
+                    self._append_fragment(ctx, frag_content)
                     break
                 except compat_urllib_error.HTTPError as err:
                     # YouTube may often return 404 HTTP error for a fragment causing the
@@ -63,22 +50,14 @@ class DashSegmentsFD(FragmentFD):
                     # HTTP error.
                     count += 1
                     if count <= fragment_retries:
-                        self.report_retry_fragment(err, segment_name, count, fragment_retries)
+                        self.report_retry_fragment(err, frag_index, count, fragment_retries)
             if count > fragment_retries:
                 if not fatal:
-                    self.report_skip_fragment(segment_name)
-                    return True
+                    self.report_skip_fragment(frag_index)
+                    continue
                 self.report_error('giving up after %s fragment retries' % fragment_retries)
                 return False
-            return True
-
-        for i, segment in enumerate(segments):
-            if not process_segment(segment, ctx['tmpfilename'], i):
-                return False
 
         self._finish_frag_download(ctx)
 
-        for segment_file in segments_filenames:
-            os.remove(encodeFilename(segment_file))
-
         return True
diff --git a/youtube_dl/downloader/f4m.py b/youtube_dl/downloader/f4m.py
index 688e086eb..c8fde9a89 100644
--- a/youtube_dl/downloader/f4m.py
+++ b/youtube_dl/downloader/f4m.py
@@ -3,7 +3,6 @@ from __future__ import division, unicode_literals
 import base64
 import io
 import itertools
-import os
 import time
 
 from .fragment import FragmentFD
@@ -16,9 +15,7 @@ from ..compat import (
     compat_struct_unpack,
 )
 from ..utils import (
-    encodeFilename,
     fix_xml_ampersands,
-    sanitize_open,
     xpath_text,
 )
 
@@ -366,17 +363,21 @@ class F4mFD(FragmentFD):
 
         dest_stream = ctx['dest_stream']
 
-        write_flv_header(dest_stream)
-        if not live:
-            write_metadata_tag(dest_stream, metadata)
+        if ctx['complete_frags_downloaded_bytes'] == 0:
+            write_flv_header(dest_stream)
+            if not live:
+                write_metadata_tag(dest_stream, metadata)
 
         base_url_parsed = compat_urllib_parse_urlparse(base_url)
 
         self._start_frag_download(ctx)
 
-        frags_filenames = []
+        frag_index = 0
         while fragments_list:
             seg_i, frag_i = fragments_list.pop(0)
+            frag_index += 1
+            if frag_index <= ctx['fragment_index']:
+                continue
             name = 'Seg%d-Frag%d' % (seg_i, frag_i)
             query = []
             if base_url_parsed.query:
@@ -386,17 +387,10 @@ class F4mFD(FragmentFD):
             if info_dict.get('extra_param_to_segment_url'):
                 query.append(info_dict['extra_param_to_segment_url'])
             url_parsed = base_url_parsed._replace(path=base_url_parsed.path + name, query='&'.join(query))
-            frag_filename = '%s-%s' % (ctx['tmpfilename'], name)
             try:
-                success = ctx['dl'].download(frag_filename, {
-                    'url': url_parsed.geturl(),
-                    'http_headers': info_dict.get('http_headers'),
-                })
+                success, down_data = self._download_fragment(ctx, url_parsed.geturl(), info_dict)
                 if not success:
                     return False
-                (down, frag_sanitized) = sanitize_open(frag_filename, 'rb')
-                down_data = down.read()
-                down.close()
                 reader = FlvReader(down_data)
                 while True:
                     try:
@@ -411,12 +405,8 @@ class F4mFD(FragmentFD):
                             break
                         raise
                     if box_type == b'mdat':
-                        dest_stream.write(box_data)
+                        self._append_fragment(ctx, box_data)
                         break
-                if live:
-                    os.remove(encodeFilename(frag_sanitized))
-                else:
-                    frags_filenames.append(frag_sanitized)
             except (compat_urllib_error.HTTPError, ) as err:
                 if live and (err.code == 404 or err.code == 410):
                     # We didn't keep up with the live window. Continue
@@ -436,7 +426,4 @@ class F4mFD(FragmentFD):
 
         self._finish_frag_download(ctx)
 
-        for frag_file in frags_filenames:
-            os.remove(encodeFilename(frag_file))
-
         return True
diff --git a/youtube_dl/downloader/fragment.py b/youtube_dl/downloader/fragment.py
index 56f975266..bb9e82578 100644
--- a/youtube_dl/downloader/fragment.py
+++ b/youtube_dl/downloader/fragment.py
@@ -2,6 +2,7 @@ from __future__ import division, unicode_literals
 
 import os
 import time
+import json
 
 from .common import FileDownloader
 from .http import HttpFD
@@ -28,15 +29,37 @@ class FragmentFD(FileDownloader):
                         and hlsnative only)
     skip_unavailable_fragments:
                         Skip unavailable fragments (DASH and hlsnative only)
+    keep_fragments:     Keep downloaded fragments on disk after downloading is
+                        finished
+
+    For each incomplete fragment download youtube-dl keeps on disk a special
+    bookkeeping file with download state and metadata (in future such files will
+    be used for any incomplete download handled by youtube-dl). This file is
+    used to properly handle resuming, check download file consistency and detect
+    potential errors. The file has a .ytdl extension and represents a standard
+    JSON file of the following format:
+
+    extractor:
+        Dictionary of extractor related data. TBD.
+
+    downloader:
+        Dictionary of downloader related data. May contain following data:
+            current_fragment:
+                Dictionary with current (being downloaded) fragment data:
+                index:  0-based index of current fragment among all fragments
+            fragment_count:
+                Total count of fragments
+                
+    This feature is experimental and file format may change in future.
     """
 
-    def report_retry_fragment(self, err, fragment_name, count, retries):
+    def report_retry_fragment(self, err, frag_index, count, retries):
         self.to_screen(
-            '[download] Got server HTTP error: %s. Retrying fragment %s (attempt %d of %s)...'
-            % (error_to_compat_str(err), fragment_name, count, self.format_retries(retries)))
+            '[download] Got server HTTP error: %s. Retrying fragment %d (attempt %d of %s)...'
+            % (error_to_compat_str(err), frag_index, count, self.format_retries(retries)))
 
-    def report_skip_fragment(self, fragment_name):
-        self.to_screen('[download] Skipping fragment %s...' % fragment_name)
+    def report_skip_fragment(self, frag_index):
+        self.to_screen('[download] Skipping fragment %d...' % frag_index)
 
     def _prepare_url(self, info_dict, url):
         headers = info_dict.get('http_headers')
@@ -46,6 +69,51 @@ class FragmentFD(FileDownloader):
         self._prepare_frag_download(ctx)
         self._start_frag_download(ctx)
 
+    @staticmethod
+    def __do_ytdl_file(ctx):
+        return not ctx['live'] and not ctx['tmpfilename'] == '-'
+
+    def _read_ytdl_file(self, ctx):
+        stream, _ = sanitize_open(self.ytdl_filename(ctx['filename']), 'r')
+        ctx['fragment_index'] = json.loads(stream.read())['downloader']['current_fragment']['index']
+        stream.close()
+
+    def _write_ytdl_file(self, ctx):
+        frag_index_stream, _ = sanitize_open(self.ytdl_filename(ctx['filename']), 'w')
+        downloader = {
+            'current_fragment': {
+                'index': ctx['fragment_index'],
+            },
+        }
+        if ctx.get('fragment_count') is not None:
+            downloader['fragment_count'] = ctx['fragment_count']
+        frag_index_stream.write(json.dumps({'downloader': downloader}))
+        frag_index_stream.close()
+
+    def _download_fragment(self, ctx, frag_url, info_dict, headers=None):
+        fragment_filename = '%s-Frag%d' % (ctx['tmpfilename'], ctx['fragment_index'])
+        success = ctx['dl'].download(fragment_filename, {
+            'url': frag_url,
+            'http_headers': headers or info_dict.get('http_headers'),
+        })
+        if not success:
+            return False, None
+        down, frag_sanitized = sanitize_open(fragment_filename, 'rb')
+        ctx['fragment_filename_sanitized'] = frag_sanitized
+        frag_content = down.read()
+        down.close()
+        return True, frag_content
+
+    def _append_fragment(self, ctx, frag_content):
+        try:
+            ctx['dest_stream'].write(frag_content)
+        finally:
+            if self.__do_ytdl_file(ctx):
+                self._write_ytdl_file(ctx)
+            if not self.params.get('keep_fragments', False):
+                os.remove(ctx['fragment_filename_sanitized'])
+            del ctx['fragment_filename_sanitized']
+
     def _prepare_frag_download(self, ctx):
         if 'live' not in ctx:
             ctx['live'] = False
@@ -66,11 +134,38 @@ class FragmentFD(FileDownloader):
             }
         )
         tmpfilename = self.temp_name(ctx['filename'])
-        dest_stream, tmpfilename = sanitize_open(tmpfilename, 'wb')
+        open_mode = 'wb'
+        resume_len = 0
+
+        # Establish possible resume length
+        if os.path.isfile(encodeFilename(tmpfilename)):
+            open_mode = 'ab'
+            resume_len = os.path.getsize(encodeFilename(tmpfilename))
+
+        # Should be initialized before ytdl file check
+        ctx.update({
+            'tmpfilename': tmpfilename,
+            'fragment_index': 0,
+        })
+
+        if self.__do_ytdl_file(ctx):
+            if os.path.isfile(encodeFilename(self.ytdl_filename(ctx['filename']))):
+                self._read_ytdl_file(ctx)
+            else:
+                self._write_ytdl_file(ctx)
+            if ctx['fragment_index'] > 0:
+                assert resume_len > 0
+            else:
+                assert resume_len == 0
+
+        dest_stream, tmpfilename = sanitize_open(tmpfilename, open_mode)
+
         ctx.update({
             'dl': dl,
             'dest_stream': dest_stream,
             'tmpfilename': tmpfilename,
+            # Total complete fragments downloaded so far in bytes
+            'complete_frags_downloaded_bytes': resume_len,
         })
 
     def _start_frag_download(self, ctx):
@@ -79,9 +174,9 @@ class FragmentFD(FileDownloader):
         # hook
         state = {
             'status': 'downloading',
-            'downloaded_bytes': 0,
-            'frag_index': 0,
-            'frag_count': total_frags,
+            'downloaded_bytes': ctx['complete_frags_downloaded_bytes'],
+            'fragment_index': ctx['fragment_index'],
+            'fragment_count': total_frags,
             'filename': ctx['filename'],
             'tmpfilename': ctx['tmpfilename'],
         }
@@ -89,8 +184,6 @@ class FragmentFD(FileDownloader):
         start = time.time()
         ctx.update({
             'started': start,
-            # Total complete fragments downloaded so far in bytes
-            'complete_frags_downloaded_bytes': 0,
             # Amount of fragment's bytes downloaded by the time of the previous
             # frag progress hook invocation
             'prev_frag_downloaded_bytes': 0,
@@ -106,11 +199,12 @@ class FragmentFD(FileDownloader):
             if not ctx['live']:
                 estimated_size = (
                     (ctx['complete_frags_downloaded_bytes'] + frag_total_bytes) /
-                    (state['frag_index'] + 1) * total_frags)
+                    (state['fragment_index'] + 1) * total_frags)
                 state['total_bytes_estimate'] = estimated_size
 
             if s['status'] == 'finished':
-                state['frag_index'] += 1
+                state['fragment_index'] += 1
+                ctx['fragment_index'] = state['fragment_index']
                 state['downloaded_bytes'] += frag_total_bytes - ctx['prev_frag_downloaded_bytes']
                 ctx['complete_frags_downloaded_bytes'] = state['downloaded_bytes']
                 ctx['prev_frag_downloaded_bytes'] = 0
@@ -132,6 +226,10 @@ class FragmentFD(FileDownloader):
 
     def _finish_frag_download(self, ctx):
         ctx['dest_stream'].close()
+        if self.__do_ytdl_file(ctx):
+            ytdl_filename = encodeFilename(self.ytdl_filename(ctx['filename']))
+            if os.path.isfile(ytdl_filename):
+                os.remove(ytdl_filename)
         elapsed = time.time() - ctx['started']
         self.try_rename(ctx['tmpfilename'], ctx['filename'])
         fsize = os.path.getsize(encodeFilename(ctx['filename']))
diff --git a/youtube_dl/downloader/hls.py b/youtube_dl/downloader/hls.py
index d0a5f7ba4..0e29c8a2a 100644
--- a/youtube_dl/downloader/hls.py
+++ b/youtube_dl/downloader/hls.py
@@ -1,6 +1,5 @@
 from __future__ import unicode_literals
 
-import os.path
 import re
 import binascii
 try:
@@ -18,8 +17,6 @@ from ..compat import (
     compat_struct_pack,
 )
 from ..utils import (
-    encodeFilename,
-    sanitize_open,
     parse_m3u8_attributes,
     update_url_query,
 )
@@ -103,17 +100,18 @@ class HlsFD(FragmentFD):
         media_sequence = 0
         decrypt_info = {'METHOD': 'NONE'}
         byte_range = {}
-        frags_filenames = []
+        frag_index = 0
         for line in s.splitlines():
             line = line.strip()
             if line:
                 if not line.startswith('#'):
+                    frag_index += 1
+                    if frag_index <= ctx['fragment_index']:
+                        continue
                     frag_url = (
                         line
                         if re.match(r'^https?://', line)
                         else compat_urlparse.urljoin(man_url, line))
-                    frag_name = 'Frag%d' % i
-                    frag_filename = '%s-%s' % (ctx['tmpfilename'], frag_name)
                     if extra_query:
                         frag_url = update_url_query(frag_url, extra_query)
                     count = 0
@@ -122,15 +120,10 @@ class HlsFD(FragmentFD):
                         headers['Range'] = 'bytes=%d-%d' % (byte_range['start'], byte_range['end'])
                     while count <= fragment_retries:
                         try:
-                            success = ctx['dl'].download(frag_filename, {
-                                'url': frag_url,
-                                'http_headers': headers,
-                            })
+                            success, frag_content = self._download_fragment(
+                                ctx, frag_url, info_dict, headers)
                             if not success:
                                 return False
-                            down, frag_sanitized = sanitize_open(frag_filename, 'rb')
-                            frag_content = down.read()
-                            down.close()
                             break
                         except compat_urllib_error.HTTPError as err:
                             # Unavailable (possibly temporary) fragments may be served.
@@ -139,28 +132,29 @@ class HlsFD(FragmentFD):
                             # https://github.com/rg3/youtube-dl/issues/10448).
                             count += 1
                             if count <= fragment_retries:
-                                self.report_retry_fragment(err, frag_name, count, fragment_retries)
+                                self.report_retry_fragment(err, frag_index, count, fragment_retries)
                     if count > fragment_retries:
                         if skip_unavailable_fragments:
                             i += 1
                             media_sequence += 1
-                            self.report_skip_fragment(frag_name)
+                            self.report_skip_fragment(frag_index)
                             continue
                         self.report_error(
                             'giving up after %s fragment retries' % fragment_retries)
                         return False
                     if decrypt_info['METHOD'] == 'AES-128':
                         iv = decrypt_info.get('IV') or compat_struct_pack('>8xq', media_sequence)
+                        decrypt_info['KEY'] = decrypt_info.get('KEY') or self.ydl.urlopen(decrypt_info['URI']).read()
                         frag_content = AES.new(
                             decrypt_info['KEY'], AES.MODE_CBC, iv).decrypt(frag_content)
-                    ctx['dest_stream'].write(frag_content)
-                    frags_filenames.append(frag_sanitized)
+                    self._append_fragment(ctx, frag_content)
                     # We only download the first fragment during the test
                     if test:
                         break
                     i += 1
                     media_sequence += 1
                 elif line.startswith('#EXT-X-KEY'):
+                    decrypt_url = decrypt_info.get('URI')
                     decrypt_info = parse_m3u8_attributes(line[11:])
                     if decrypt_info['METHOD'] == 'AES-128':
                         if 'IV' in decrypt_info:
@@ -170,7 +164,8 @@ class HlsFD(FragmentFD):
                                 man_url, decrypt_info['URI'])
                         if extra_query:
                             decrypt_info['URI'] = update_url_query(decrypt_info['URI'], extra_query)
-                        decrypt_info['KEY'] = self.ydl.urlopen(decrypt_info['URI']).read()
+                        if decrypt_url != decrypt_info['URI']:
+                            decrypt_info['KEY'] = None
                 elif line.startswith('#EXT-X-MEDIA-SEQUENCE'):
                     media_sequence = int(line[22:])
                 elif line.startswith('#EXT-X-BYTERANGE'):
@@ -183,7 +178,4 @@ class HlsFD(FragmentFD):
 
         self._finish_frag_download(ctx)
 
-        for frag_file in frags_filenames:
-            os.remove(encodeFilename(frag_file))
-
         return True
diff --git a/youtube_dl/downloader/ism.py b/youtube_dl/downloader/ism.py
index 63a636cb7..5f6f9faef 100644
--- a/youtube_dl/downloader/ism.py
+++ b/youtube_dl/downloader/ism.py
@@ -1,6 +1,5 @@
 from __future__ import unicode_literals
 
-import os
 import time
 import struct
 import binascii
@@ -8,10 +7,6 @@ import io
 
 from .fragment import FragmentFD
 from ..compat import compat_urllib_error
-from ..utils import (
-    sanitize_open,
-    encodeFilename,
-)
 
 
 u8 = struct.Struct(b'>B')
@@ -225,50 +220,39 @@ class IsmFD(FragmentFD):
 
         self._prepare_and_start_frag_download(ctx)
 
-        segments_filenames = []
-
         fragment_retries = self.params.get('fragment_retries', 0)
         skip_unavailable_fragments = self.params.get('skip_unavailable_fragments', True)
 
         track_written = False
+        frag_index = 0
         for i, segment in enumerate(segments):
-            segment_url = segment['url']
-            segment_name = 'Frag%d' % i
-            target_filename = '%s-%s' % (ctx['tmpfilename'], segment_name)
+            frag_index += 1
+            if frag_index <= ctx['fragment_index']:
+                continue
             count = 0
             while count <= fragment_retries:
                 try:
-                    success = ctx['dl'].download(target_filename, {
-                        'url': segment_url,
-                        'http_headers': info_dict.get('http_headers'),
-                    })
+                    success, frag_content = self._download_fragment(ctx, segment['url'], info_dict)
                     if not success:
                         return False
-                    down, target_sanitized = sanitize_open(target_filename, 'rb')
-                    down_data = down.read()
                     if not track_written:
-                        tfhd_data = extract_box_data(down_data, [b'moof', b'traf', b'tfhd'])
+                        tfhd_data = extract_box_data(frag_content, [b'moof', b'traf', b'tfhd'])
                         info_dict['_download_params']['track_id'] = u32.unpack(tfhd_data[4:8])[0]
                         write_piff_header(ctx['dest_stream'], info_dict['_download_params'])
                         track_written = True
-                    ctx['dest_stream'].write(down_data)
-                    down.close()
-                    segments_filenames.append(target_sanitized)
+                    self._append_fragment(ctx, frag_content)
                     break
                 except compat_urllib_error.HTTPError as err:
                     count += 1
                     if count <= fragment_retries:
-                        self.report_retry_fragment(err, segment_name, count, fragment_retries)
+                        self.report_retry_fragment(err, frag_index, count, fragment_retries)
             if count > fragment_retries:
                 if skip_unavailable_fragments:
-                    self.report_skip_fragment(segment_name)
+                    self.report_skip_fragment(frag_index)
                     continue
                 self.report_error('giving up after %s fragment retries' % fragment_retries)
                 return False
 
         self._finish_frag_download(ctx)
 
-        for segment_file in segments_filenames:
-            os.remove(encodeFilename(segment_file))
-
         return True
diff --git a/youtube_dl/extractor/amp.py b/youtube_dl/extractor/amp.py
index e8e40126b..98f8e69cd 100644
--- a/youtube_dl/extractor/amp.py
+++ b/youtube_dl/extractor/amp.py
@@ -7,15 +7,19 @@ from ..utils import (
     parse_iso8601,
     mimetype2ext,
     determine_ext,
+    ExtractorError,
 )
 
 
 class AMPIE(InfoExtractor):
     # parse Akamai Adaptive Media Player feed
     def _extract_feed_info(self, url):
-        item = self._download_json(
+        feed = self._download_json(
             url, None, 'Downloading Akamai AMP feed',
-            'Unable to download Akamai AMP feed')['channel']['item']
+            'Unable to download Akamai AMP feed')
+        item = feed.get('channel', {}).get('item')
+        if not item:
+            raise ExtractorError('%s said: %s' % (self.IE_NAME, feed['error']))
 
         video_id = item['guid']
 
diff --git a/youtube_dl/extractor/arte.py b/youtube_dl/extractor/arte.py
index 69a23e88c..56baef29d 100644
--- a/youtube_dl/extractor/arte.py
+++ b/youtube_dl/extractor/arte.py
@@ -180,7 +180,7 @@ class ArteTVBaseIE(InfoExtractor):
 
 class ArteTVPlus7IE(ArteTVBaseIE):
     IE_NAME = 'arte.tv:+7'
-    _VALID_URL = r'https?://(?:(?:www|sites)\.)?arte\.tv/[^/]+/(?P<lang>fr|de|en|es)/(?:[^/]+/)*(?P<id>[^/?#&]+)'
+    _VALID_URL = r'https?://(?:(?:www|sites)\.)?arte\.tv/(?:[^/]+/)?(?P<lang>fr|de|en|es)/(?:videos/)?(?:[^/]+/)*(?P<id>[^/?#&]+)'
 
     _TESTS = [{
         'url': 'http://www.arte.tv/guide/de/sendungen/XEN/xenius/?vid=055918-015_PLUS7-D',
@@ -188,6 +188,9 @@ class ArteTVPlus7IE(ArteTVBaseIE):
     }, {
         'url': 'http://sites.arte.tv/karambolage/de/video/karambolage-22',
         'only_matching': True,
+    }, {
+        'url': 'http://www.arte.tv/de/videos/048696-000-A/der-kluge-bauch-unser-zweites-gehirn',
+        'only_matching': True,
     }]
 
     @classmethod
diff --git a/youtube_dl/extractor/azubu.py b/youtube_dl/extractor/azubu.py
deleted file mode 100644
index 3ba2f00d3..000000000
--- a/youtube_dl/extractor/azubu.py
+++ /dev/null
@@ -1,140 +0,0 @@
-from __future__ import unicode_literals
-
-import json
-
-from .common import InfoExtractor
-from ..utils import (
-    ExtractorError,
-    float_or_none,
-    sanitized_Request,
-)
-
-
-class AzubuIE(InfoExtractor):
-    _VALID_URL = r'https?://(?:www\.)?azubu\.(?:tv|uol.com.br)/[^/]+#!/play/(?P<id>\d+)'
-    _TESTS = [
-        {
-            'url': 'http://www.azubu.tv/GSL#!/play/15575/2014-hot6-cup-last-big-match-ro8-day-1',
-            'md5': 'a88b42fcf844f29ad6035054bd9ecaf4',
-            'info_dict': {
-                'id': '15575',
-                'ext': 'mp4',
-                'title': '2014 HOT6 CUP LAST BIG MATCH Ro8 Day 1',
-                'description': 'md5:d06bdea27b8cc4388a90ad35b5c66c01',
-                'thumbnail': r're:^https?://.*\.jpe?g',
-                'timestamp': 1417523507.334,
-                'upload_date': '20141202',
-                'duration': 9988.7,
-                'uploader': 'GSL',
-                'uploader_id': 414310,
-                'view_count': int,
-            },
-        },
-        {
-            'url': 'http://www.azubu.tv/FnaticTV#!/play/9344/-fnatic-at-worlds-2014:-toyz---%22i-love-rekkles,-he-has-amazing-mechanics%22-',
-            'md5': 'b72a871fe1d9f70bd7673769cdb3b925',
-            'info_dict': {
-                'id': '9344',
-                'ext': 'mp4',
-                'title': 'Fnatic at Worlds 2014: Toyz - "I love Rekkles, he has amazing mechanics"',
-                'description': 'md5:4a649737b5f6c8b5c5be543e88dc62af',
-                'thumbnail': r're:^https?://.*\.jpe?g',
-                'timestamp': 1410530893.320,
-                'upload_date': '20140912',
-                'duration': 172.385,
-                'uploader': 'FnaticTV',
-                'uploader_id': 272749,
-                'view_count': int,
-            },
-            'skip': 'Channel offline',
-        },
-    ]
-
-    def _real_extract(self, url):
-        video_id = self._match_id(url)
-
-        data = self._download_json(
-            'http://www.azubu.tv/api/video/%s' % video_id, video_id)['data']
-
-        title = data['title'].strip()
-        description = data.get('description')
-        thumbnail = data.get('thumbnail')
-        view_count = data.get('view_count')
-        user = data.get('user', {})
-        uploader = user.get('username')
-        uploader_id = user.get('id')
-
-        stream_params = json.loads(data['stream_params'])
-
-        timestamp = float_or_none(stream_params.get('creationDate'), 1000)
-        duration = float_or_none(stream_params.get('length'), 1000)
-
-        renditions = stream_params.get('renditions') or []
-        video = stream_params.get('FLVFullLength') or stream_params.get('videoFullLength')
-        if video:
-            renditions.append(video)
-
-        if not renditions and not user.get('channel', {}).get('is_live', True):
-            raise ExtractorError('%s said: channel is offline.' % self.IE_NAME, expected=True)
-
-        formats = [{
-            'url': fmt['url'],
-            'width': fmt['frameWidth'],
-            'height': fmt['frameHeight'],
-            'vbr': float_or_none(fmt['encodingRate'], 1000),
-            'filesize': fmt['size'],
-            'vcodec': fmt['videoCodec'],
-            'container': fmt['videoContainer'],
-        } for fmt in renditions if fmt['url']]
-        self._sort_formats(formats)
-
-        return {
-            'id': video_id,
-            'title': title,
-            'description': description,
-            'thumbnail': thumbnail,
-            'timestamp': timestamp,
-            'duration': duration,
-            'uploader': uploader,
-            'uploader_id': uploader_id,
-            'view_count': view_count,
-            'formats': formats,
-        }
-
-
-class AzubuLiveIE(InfoExtractor):
-    _VALID_URL = r'https?://(?:www\.)?azubu\.(?:tv|uol.com.br)/(?P<id>[^/]+)$'
-
-    _TESTS = [{
-        'url': 'http://www.azubu.tv/MarsTVMDLen',
-        'only_matching': True,
-    }, {
-        'url': 'http://azubu.uol.com.br/adolfz',
-        'only_matching': True,
-    }]
-
-    def _real_extract(self, url):
-        user = self._match_id(url)
-
-        info = self._download_json(
-            'http://api.azubu.tv/public/modules/last-video/{0}/info'.format(user),
-            user)['data']
-        if info['type'] != 'STREAM':
-            raise ExtractorError('{0} is not streaming live'.format(user), expected=True)
-
-        req = sanitized_Request(
-            'https://edge-elb.api.brightcove.com/playback/v1/accounts/3361910549001/videos/ref:' + info['reference_id'])
-        req.add_header('Accept', 'application/json;pk=BCpkADawqM1gvI0oGWg8dxQHlgT8HkdE2LnAlWAZkOlznO39bSZX726u4JqnDsK3MDXcO01JxXK2tZtJbgQChxgaFzEVdHRjaDoxaOu8hHOO8NYhwdxw9BzvgkvLUlpbDNUuDoc4E4wxDToV')
-        bc_info = self._download_json(req, user)
-        m3u8_url = next(source['src'] for source in bc_info['sources'] if source['container'] == 'M2TS')
-        formats = self._extract_m3u8_formats(m3u8_url, user, ext='mp4')
-        self._sort_formats(formats)
-
-        return {
-            'id': info['id'],
-            'title': self._live_title(info['title']),
-            'uploader_id': user,
-            'formats': formats,
-            'is_live': True,
-            'thumbnail': bc_info['poster'],
-        }
diff --git a/youtube_dl/extractor/brightcove.py b/youtube_dl/extractor/brightcove.py
index 124497e95..97602ca30 100644
--- a/youtube_dl/extractor/brightcove.py
+++ b/youtube_dl/extractor/brightcove.py
@@ -131,6 +131,12 @@ class BrightcoveLegacyIE(InfoExtractor):
             },
             'playlist_mincount': 10,
         },
+        {
+            # playerID inferred from bcpid
+            # from http://www.un.org/chinese/News/story.asp?NewsID=27724
+            'url': 'https://link.brightcove.com/services/player/bcpid1722935254001/?bctid=5360463607001&autoStart=false&secureConnections=true&width=650&height=350',
+            'only_matching': True,  # Tested in GenericIE
+        }
     ]
     FLV_VCODECS = {
         1: 'SORENSON',
@@ -266,9 +272,13 @@ class BrightcoveLegacyIE(InfoExtractor):
         if matches:
             return list(filter(None, [cls._build_brighcove_url(m) for m in matches]))
 
-        return list(filter(None, [
-            cls._build_brighcove_url_from_js(custom_bc)
-            for custom_bc in re.findall(r'(customBC\.createVideo\(.+?\);)', webpage)]))
+        matches = re.findall(r'(customBC\.createVideo\(.+?\);)', webpage)
+        if matches:
+            return list(filter(None, [
+                cls._build_brighcove_url_from_js(custom_bc)
+                for custom_bc in matches]))
+        return [src for _, src in re.findall(
+            r'<iframe[^>]+src=([\'"])((?:https?:)?//link\.brightcove\.com/services/player/(?!\1).+)\1', webpage)]
 
     def _real_extract(self, url):
         url, smuggled_data = unsmuggle_url(url, {})
@@ -285,6 +295,10 @@ class BrightcoveLegacyIE(InfoExtractor):
         if videoPlayer:
             # We set the original url as the default 'Referer' header
             referer = smuggled_data.get('Referer', url)
+            if 'playerID' not in query:
+                mobj = re.search(r'/bcpid(\d+)', url)
+                if mobj is not None:
+                    query['playerID'] = [mobj.group(1)]
             return self._get_video_info(
                 videoPlayer[0], query, referer=referer)
         elif 'playerKey' in query:
@@ -484,8 +498,8 @@ class BrightcoveNewIE(InfoExtractor):
     }]
 
     @staticmethod
-    def _extract_url(webpage):
-        urls = BrightcoveNewIE._extract_urls(webpage)
+    def _extract_url(ie, webpage):
+        urls = BrightcoveNewIE._extract_urls(ie, webpage)
         return urls[0] if urls else None
 
     @staticmethod
@@ -508,7 +522,7 @@ class BrightcoveNewIE(InfoExtractor):
         # [2] looks like:
         for video, script_tag, account_id, player_id, embed in re.findall(
                 r'''(?isx)
-                    (<video\s+[^>]+>)
+                    (<video\s+[^>]*data-video-id=['"]?[^>]+>)
                     (?:.*?
                         (<script[^>]+
                             src=["\'](?:https?:)?//players\.brightcove\.net/
diff --git a/youtube_dl/extractor/common.py b/youtube_dl/extractor/common.py
index 12e010a0d..8b3f04c61 100644
--- a/youtube_dl/extractor/common.py
+++ b/youtube_dl/extractor/common.py
@@ -976,6 +976,22 @@ class InfoExtractor(object):
             return info
         if isinstance(json_ld, dict):
             json_ld = [json_ld]
+
+        def extract_video_object(e):
+            assert e['@type'] == 'VideoObject'
+            info.update({
+                'url': e.get('contentUrl'),
+                'title': unescapeHTML(e.get('name')),
+                'description': unescapeHTML(e.get('description')),
+                'thumbnail': e.get('thumbnailUrl') or e.get('thumbnailURL'),
+                'duration': parse_duration(e.get('duration')),
+                'timestamp': unified_timestamp(e.get('uploadDate')),
+                'filesize': float_or_none(e.get('contentSize')),
+                'tbr': int_or_none(e.get('bitrate')),
+                'width': int_or_none(e.get('width')),
+                'height': int_or_none(e.get('height')),
+            })
+
         for e in json_ld:
             if e.get('@context') == 'http://schema.org':
                 item_type = e.get('@type')
@@ -1000,18 +1016,11 @@ class InfoExtractor(object):
                         'description': unescapeHTML(e.get('articleBody')),
                     })
                 elif item_type == 'VideoObject':
-                    info.update({
-                        'url': e.get('contentUrl'),
-                        'title': unescapeHTML(e.get('name')),
-                        'description': unescapeHTML(e.get('description')),
-                        'thumbnail': e.get('thumbnailUrl') or e.get('thumbnailURL'),
-                        'duration': parse_duration(e.get('duration')),
-                        'timestamp': unified_timestamp(e.get('uploadDate')),
-                        'filesize': float_or_none(e.get('contentSize')),
-                        'tbr': int_or_none(e.get('bitrate')),
-                        'width': int_or_none(e.get('width')),
-                        'height': int_or_none(e.get('height')),
-                    })
+                    extract_video_object(e)
+                elif item_type == 'WebPage':
+                    video = e.get('video')
+                    if isinstance(video, dict) and video.get('@type') == 'VideoObject':
+                        extract_video_object(video)
                 break
         return dict((k, v) for k, v in info.items() if v is not None)
 
@@ -1303,17 +1312,25 @@ class InfoExtractor(object):
                               entry_protocol='m3u8', preference=None,
                               m3u8_id=None, note=None, errnote=None,
                               fatal=True, live=False):
-
         res = self._download_webpage_handle(
             m3u8_url, video_id,
             note=note or 'Downloading m3u8 information',
             errnote=errnote or 'Failed to download m3u8 information',
             fatal=fatal)
+
         if res is False:
             return []
+
         m3u8_doc, urlh = res
         m3u8_url = urlh.geturl()
 
+        return self._parse_m3u8_formats(
+            m3u8_doc, m3u8_url, ext=ext, entry_protocol=entry_protocol,
+            preference=preference, m3u8_id=m3u8_id, live=live)
+
+    def _parse_m3u8_formats(self, m3u8_doc, m3u8_url, ext=None,
+                            entry_protocol='m3u8', preference=None,
+                            m3u8_id=None, live=False):
         if '#EXT-X-FAXS-CM:' in m3u8_doc:  # Adobe Flash Access
             return []
 
@@ -1324,19 +1341,21 @@ class InfoExtractor(object):
             if re.match(r'^https?://', u)
             else compat_urlparse.urljoin(m3u8_url, u))
 
-        # We should try extracting formats only from master playlists [1], i.e.
-        # playlists that describe available qualities. On the other hand media
-        # playlists [2] should be returned as is since they contain just the media
-        # without qualities renditions.
+        # References:
+        # 1. https://tools.ietf.org/html/draft-pantos-http-live-streaming-21
+        # 2. https://github.com/rg3/youtube-dl/issues/12211
+
+        # We should try extracting formats only from master playlists [1, 4.3.4],
+        # i.e. playlists that describe available qualities. On the other hand
+        # media playlists [1, 4.3.3] should be returned as is since they contain
+        # just the media without qualities renditions.
         # Fortunately, master playlist can be easily distinguished from media
-        # playlist based on particular tags availability. As of [1, 2] master
-        # playlist tags MUST NOT appear in a media playist and vice versa.
-        # As of [3] #EXT-X-TARGETDURATION tag is REQUIRED for every media playlist
-        # and MUST NOT appear in master playlist thus we can clearly detect media
-        # playlist with this criterion.
-        # 1. https://tools.ietf.org/html/draft-pantos-http-live-streaming-17#section-4.3.4
-        # 2. https://tools.ietf.org/html/draft-pantos-http-live-streaming-17#section-4.3.3
-        # 3. https://tools.ietf.org/html/draft-pantos-http-live-streaming-17#section-4.3.3.1
+        # playlist based on particular tags availability. As of [1, 4.3.3, 4.3.4]
+        # master playlist tags MUST NOT appear in a media playist and vice versa.
+        # As of [1, 4.3.3.1] #EXT-X-TARGETDURATION tag is REQUIRED for every
+        # media playlist and MUST NOT appear in master playlist thus we can
+        # clearly detect media playlist with this criterion.
+
         if '#EXT-X-TARGETDURATION' in m3u8_doc:  # media playlist, return as is
             return [{
                 'url': m3u8_url,
@@ -1345,52 +1364,71 @@ class InfoExtractor(object):
                 'protocol': entry_protocol,
                 'preference': preference,
             }]
-        audio_in_video_stream = {}
-        last_info = {}
-        last_media = {}
+
+        groups = {}
+        last_stream_inf = {}
+
+        def extract_media(x_media_line):
+            media = parse_m3u8_attributes(x_media_line)
+            # As per [1, 4.3.4.1] TYPE, GROUP-ID and NAME are REQUIRED
+            media_type, group_id, name = media.get('TYPE'), media.get('GROUP-ID'), media.get('NAME')
+            if not (media_type and group_id and name):
+                return
+            groups.setdefault(group_id, []).append(media)
+            if media_type not in ('VIDEO', 'AUDIO'):
+                return
+            media_url = media.get('URI')
+            if media_url:
+                format_id = []
+                for v in (group_id, name):
+                    if v:
+                        format_id.append(v)
+                f = {
+                    'format_id': '-'.join(format_id),
+                    'url': format_url(media_url),
+                    'language': media.get('LANGUAGE'),
+                    'ext': ext,
+                    'protocol': entry_protocol,
+                    'preference': preference,
+                }
+                if media_type == 'AUDIO':
+                    f['vcodec'] = 'none'
+                formats.append(f)
+
+        def build_stream_name():
+            # Despite specification does not mention NAME attribute for
+            # EXT-X-STREAM-INF tag it still sometimes may be present (see [1]
+            # or vidio test in TestInfoExtractor.test_parse_m3u8_formats)
+            # 1. http://www.vidio.com/watch/165683-dj_ambred-booyah-live-2015
+            stream_name = last_stream_inf.get('NAME')
+            if stream_name:
+                return stream_name
+            # If there is no NAME in EXT-X-STREAM-INF it will be obtained
+            # from corresponding rendition group
+            stream_group_id = last_stream_inf.get('VIDEO')
+            if not stream_group_id:
+                return
+            stream_group = groups.get(stream_group_id)
+            if not stream_group:
+                return stream_group_id
+            rendition = stream_group[0]
+            return rendition.get('NAME') or stream_group_id
+
         for line in m3u8_doc.splitlines():
             if line.startswith('#EXT-X-STREAM-INF:'):
-                last_info = parse_m3u8_attributes(line)
+                last_stream_inf = parse_m3u8_attributes(line)
             elif line.startswith('#EXT-X-MEDIA:'):
-                media = parse_m3u8_attributes(line)
-                media_type = media.get('TYPE')
-                if media_type in ('VIDEO', 'AUDIO'):
-                    group_id = media.get('GROUP-ID')
-                    media_url = media.get('URI')
-                    if media_url:
-                        format_id = []
-                        for v in (group_id, media.get('NAME')):
-                            if v:
-                                format_id.append(v)
-                        f = {
-                            'format_id': '-'.join(format_id),
-                            'url': format_url(media_url),
-                            'language': media.get('LANGUAGE'),
-                            'ext': ext,
-                            'protocol': entry_protocol,
-                            'preference': preference,
-                        }
-                        if media_type == 'AUDIO':
-                            f['vcodec'] = 'none'
-                            if group_id and not audio_in_video_stream.get(group_id):
-                                audio_in_video_stream[group_id] = False
-                        formats.append(f)
-                    else:
-                        # When there is no URI in EXT-X-MEDIA let this tag's
-                        # data be used by regular URI lines below
-                        last_media = media
-                        if media_type == 'AUDIO' and group_id:
-                            audio_in_video_stream[group_id] = True
+                extract_media(line)
             elif line.startswith('#') or not line.strip():
                 continue
             else:
-                tbr = int_or_none(last_info.get('AVERAGE-BANDWIDTH') or last_info.get('BANDWIDTH'), scale=1000)
+                tbr = float_or_none(
+                    last_stream_inf.get('AVERAGE-BANDWIDTH') or
+                    last_stream_inf.get('BANDWIDTH'), scale=1000)
                 format_id = []
                 if m3u8_id:
                     format_id.append(m3u8_id)
-                # Despite specification does not mention NAME attribute for
-                # EXT-X-STREAM-INF it still sometimes may be present
-                stream_name = last_info.get('NAME') or last_media.get('NAME')
+                stream_name = build_stream_name()
                 # Bandwidth of live streams may differ over time thus making
                 # format_id unpredictable. So it's better to keep provided
                 # format_id intact.
@@ -1403,11 +1441,11 @@ class InfoExtractor(object):
                     'manifest_url': manifest_url,
                     'tbr': tbr,
                     'ext': ext,
-                    'fps': float_or_none(last_info.get('FRAME-RATE')),
+                    'fps': float_or_none(last_stream_inf.get('FRAME-RATE')),
                     'protocol': entry_protocol,
                     'preference': preference,
                 }
-                resolution = last_info.get('RESOLUTION')
+                resolution = last_stream_inf.get('RESOLUTION')
                 if resolution:
                     mobj = re.search(r'(?P<width>\d+)[xX](?P<height>\d+)', resolution)
                     if mobj:
@@ -1423,13 +1461,26 @@ class InfoExtractor(object):
                         'vbr': vbr,
                         'abr': abr,
                     })
-                f.update(parse_codecs(last_info.get('CODECS')))
-                if audio_in_video_stream.get(last_info.get('AUDIO')) is False and f['vcodec'] != 'none':
-                    # TODO: update acodec for audio only formats with the same GROUP-ID
-                    f['acodec'] = 'none'
+                codecs = parse_codecs(last_stream_inf.get('CODECS'))
+                f.update(codecs)
+                audio_group_id = last_stream_inf.get('AUDIO')
+                # As per [1, 4.3.4.1.1] any EXT-X-STREAM-INF tag which
+                # references a rendition group MUST have a CODECS attribute.
+                # However, this is not always respected, for example, [2]
+                # contains EXT-X-STREAM-INF tag which references AUDIO
+                # rendition group but does not have CODECS and despite
+                # referencing audio group an audio group, it represents
+                # a complete (with audio and video) format. So, for such cases
+                # we will ignore references to rendition groups and treat them
+                # as complete formats.
+                if audio_group_id and codecs and f.get('vcodec') != 'none':
+                    audio_group = groups.get(audio_group_id)
+                    if audio_group and audio_group[0].get('URI'):
+                        # TODO: update acodec for audio only formats with
+                        # the same GROUP-ID
+                        f['acodec'] = 'none'
                 formats.append(f)
-                last_info = {}
-                last_media = {}
+                last_stream_inf = {}
         return formats
 
     @staticmethod
@@ -1803,7 +1854,7 @@ class InfoExtractor(object):
                             'ext': mimetype2ext(mime_type),
                             'width': int_or_none(representation_attrib.get('width')),
                             'height': int_or_none(representation_attrib.get('height')),
-                            'tbr': int_or_none(bandwidth, 1000),
+                            'tbr': float_or_none(bandwidth, 1000),
                             'asr': int_or_none(representation_attrib.get('audioSamplingRate')),
                             'fps': int_or_none(representation_attrib.get('frameRate')),
                             'language': lang if lang not in ('mul', 'und', 'zxx', 'mis') else None,
@@ -2182,7 +2233,7 @@ class InfoExtractor(object):
 
     def _find_jwplayer_data(self, webpage, video_id=None, transform_source=js_to_json):
         mobj = re.search(
-            r'(?s)jwplayer\((?P<quote>[\'"])[^\'" ]+(?P=quote)\).*?\.setup\s*\((?P<options>[^)]+)\)',
+            r'(?s)jwplayer\((?P<quote>[\'"])[^\'" ]+(?P=quote)\)(?!</script>).*?\.setup\s*\((?P<options>[^)]+)\)',
             webpage)
         if mobj:
             try:
diff --git a/youtube_dl/extractor/extractors.py b/youtube_dl/extractor/extractors.py
index a92cbefed..355a4e56f 100644
--- a/youtube_dl/extractor/extractors.py
+++ b/youtube_dl/extractor/extractors.py
@@ -87,7 +87,6 @@ from .azmedien import (
     AZMedienPlaylistIE,
     AZMedienShowPlaylistIE,
 )
-from .azubu import AzubuIE, AzubuLiveIE
 from .baidu import BaiduVideoIE
 from .bambuser import BambuserIE, BambuserChannelIE
 from .bandcamp import BandcampIE, BandcampAlbumIE
diff --git a/youtube_dl/extractor/generic.py b/youtube_dl/extractor/generic.py
index b22c3122a..67184bc5d 100644
--- a/youtube_dl/extractor/generic.py
+++ b/youtube_dl/extractor/generic.py
@@ -430,6 +430,22 @@ class GenericIE(InfoExtractor):
                 'skip_download': True,  # m3u8 download
             },
         },
+        {
+            # Brightcove video in <iframe>
+            'url': 'http://www.un.org/chinese/News/story.asp?NewsID=27724',
+            'md5': '36d74ef5e37c8b4a2ce92880d208b968',
+            'info_dict': {
+                'id': '5360463607001',
+                'ext': 'mp4',
+                'title': '叙利亚失明儿童在废墟上演唱《心跳》  呼吁获得正常童年生活',
+                'description': '联合国儿童基金会中东和北非区域大使、作曲家扎德·迪拉尼（Zade Dirani）在3月15日叙利亚冲突爆发7周年纪念日之际发布了为叙利亚谱写的歌曲《心跳》（HEARTBEAT），为受到六年冲突影响的叙利亚儿童发出强烈呐喊，呼吁世界做出共同努力，使叙利亚儿童重新获得享有正常童年生活的权利。',
+                'uploader': 'United Nations',
+                'uploader_id': '1362235914001',
+                'timestamp': 1489593889,
+                'upload_date': '20170315',
+            },
+            'add_ie': ['BrightcoveLegacy'],
+        },
         {
             # Brightcove with alternative playerID key
             'url': 'http://www.nature.com/nmeth/journal/v9/n7/fig_tab/nmeth.2062_SV1.html',
diff --git a/youtube_dl/extractor/instagram.py b/youtube_dl/extractor/instagram.py
index c1921cbcf..4667335e0 100644
--- a/youtube_dl/extractor/instagram.py
+++ b/youtube_dl/extractor/instagram.py
@@ -112,7 +112,8 @@ class InstagramIE(InfoExtractor):
         webpage = self._download_webpage(url, video_id)
 
         (video_url, description, thumbnail, timestamp, uploader,
-         uploader_id, like_count, comment_count, height, width) = [None] * 10
+         uploader_id, like_count, comment_count, comments, height,
+         width) = [None] * 11
 
         shared_data = self._parse_json(
             self._search_regex(
@@ -121,7 +122,10 @@ class InstagramIE(InfoExtractor):
             video_id, fatal=False)
         if shared_data:
             media = try_get(
-                shared_data, lambda x: x['entry_data']['PostPage'][0]['media'], dict)
+                shared_data,
+                (lambda x: x['entry_data']['PostPage'][0]['graphql']['shortcode_media'],
+                 lambda x: x['entry_data']['PostPage'][0]['media']),
+                dict)
             if media:
                 video_url = media.get('video_url')
                 height = int_or_none(media.get('dimensions', {}).get('height'))
diff --git a/youtube_dl/extractor/iqiyi.py b/youtube_dl/extractor/iqiyi.py
index 2af6a6db4..fdfa7de9e 100644
--- a/youtube_dl/extractor/iqiyi.py
+++ b/youtube_dl/extractor/iqiyi.py
@@ -189,7 +189,11 @@ class IqiyiIE(InfoExtractor):
         'only_matching': True,
     }, {
         'url': 'http://yule.iqiyi.com/pcb.html',
-        'only_matching': True,
+        'info_dict': {
+            'id': '4a0af228fddb55ec96398a364248ed7f',
+            'ext': 'mp4',
+            'title': '第2017-04-21期 女艺人频遭极端粉丝骚扰',
+        },
     }, {
         # VIP-only video. The first 2 parts (6 minutes) are available without login
         # MD5 sums omitted as values are different on Travis CI and my machine
@@ -337,15 +341,18 @@ class IqiyiIE(InfoExtractor):
             url, 'temp_id', note='download video page')
 
         # There's no simple way to determine whether an URL is a playlist or not
-        # So detect it
-        playlist_result = self._extract_playlist(webpage)
-        if playlist_result:
-            return playlist_result
-
+        # Sometimes there are playlist links in individual videos, so treat it
+        # as a single video first
         tvid = self._search_regex(
-            r'data-player-tvid\s*=\s*[\'"](\d+)', webpage, 'tvid')
+            r'data-(?:player|shareplattrigger)-tvid\s*=\s*[\'"](\d+)', webpage, 'tvid', default=None)
+        if tvid is None:
+            playlist_result = self._extract_playlist(webpage)
+            if playlist_result:
+                return playlist_result
+            raise ExtractorError('Can\'t find any video')
+
         video_id = self._search_regex(
-            r'data-player-videoid\s*=\s*[\'"]([a-f\d]+)', webpage, 'video_id')
+            r'data-(?:player|shareplattrigger)-videoid\s*=\s*[\'"]([a-f\d]+)', webpage, 'video_id')
 
         formats = []
         for _ in range(5):
@@ -377,7 +384,8 @@ class IqiyiIE(InfoExtractor):
 
         self._sort_formats(formats)
         title = (get_element_by_id('widget-videotitle', webpage) or
-                 clean_html(get_element_by_attribute('class', 'mod-play-tit', webpage)))
+                 clean_html(get_element_by_attribute('class', 'mod-play-tit', webpage)) or
+                 self._html_search_regex(r'<span[^>]+data-videochanged-title="word"[^>]*>([^<]+)</span>', webpage, 'title'))
 
         return {
             'id': video_id,
diff --git a/youtube_dl/extractor/nowness.py b/youtube_dl/extractor/nowness.py
index b6c5ee6e4..f26dafb8f 100644
--- a/youtube_dl/extractor/nowness.py
+++ b/youtube_dl/extractor/nowness.py
@@ -28,7 +28,7 @@ class NownessBaseIE(InfoExtractor):
                         bc_url = BrightcoveLegacyIE._extract_brightcove_url(player_code)
                         if bc_url:
                             return self.url_result(bc_url, BrightcoveLegacyIE.ie_key())
-                        bc_url = BrightcoveNewIE._extract_url(player_code)
+                        bc_url = BrightcoveNewIE._extract_url(self, player_code)
                         if bc_url:
                             return self.url_result(bc_url, BrightcoveNewIE.ie_key())
                         raise ExtractorError('Could not find player definition')
diff --git a/youtube_dl/extractor/odnoklassniki.py b/youtube_dl/extractor/odnoklassniki.py
index b9369cea5..854b6800c 100644
--- a/youtube_dl/extractor/odnoklassniki.py
+++ b/youtube_dl/extractor/odnoklassniki.py
@@ -38,7 +38,7 @@ class OdnoklassnikiIE(InfoExtractor):
     }, {
         # metadataUrl
         'url': 'http://ok.ru/video/63567059965189-0?fromTime=5',
-        'md5': '9676cf86eff5391d35dea675d224e131',
+        'md5': '6ff470ea2dd51d5d18c295a355b0b6bc',
         'info_dict': {
             'id': '63567059965189-0',
             'ext': 'mp4',
@@ -54,7 +54,7 @@ class OdnoklassnikiIE(InfoExtractor):
     }, {
         # YouTube embed (metadataUrl, provider == USER_YOUTUBE)
         'url': 'http://ok.ru/video/64211978996595-1',
-        'md5': '5d7475d428845cd2e13bae6f1a992278',
+        'md5': '2f206894ffb5dbfcce2c5a14b909eea5',
         'info_dict': {
             'id': '64211978996595-1',
             'ext': 'mp4',
@@ -62,8 +62,8 @@ class OdnoklassnikiIE(InfoExtractor):
             'description': 'md5:848eb8b85e5e3471a3a803dae1343ed0',
             'duration': 440,
             'upload_date': '20150826',
-            'uploader_id': '750099571',
-            'uploader': 'Алина П',
+            'uploader_id': 'tvroscosmos',
+            'uploader': 'Телестудия Роскосмоса',
             'age_limit': 0,
         },
     }, {
@@ -82,6 +82,7 @@ class OdnoklassnikiIE(InfoExtractor):
         'params': {
             'skip_download': True,
         },
+        'skip': 'Video has not been found',
     }, {
         'url': 'http://ok.ru/web-api/video/moviePlayer/20079905452',
         'only_matching': True,
diff --git a/youtube_dl/extractor/porn91.py b/youtube_dl/extractor/porn91.py
index 073fc3e21..24c3600fe 100644
--- a/youtube_dl/extractor/porn91.py
+++ b/youtube_dl/extractor/porn91.py
@@ -1,10 +1,6 @@
 # coding: utf-8
 from __future__ import unicode_literals
 
-from ..compat import (
-    compat_urllib_parse_unquote,
-    compat_urllib_parse_urlencode,
-)
 from .common import InfoExtractor
 from ..utils import (
     parse_duration,
@@ -19,7 +15,7 @@ class Porn91IE(InfoExtractor):
 
     _TEST = {
         'url': 'http://91porn.com/view_video.php?viewkey=7e42283b4f5ab36da134',
-        'md5': '6df8f6d028bc8b14f5dbd73af742fb20',
+        'md5': '7fcdb5349354f40d41689bd0fa8db05a',
         'info_dict': {
             'id': '7e42283b4f5ab36da134',
             'title': '18岁大一漂亮学妹，水嫩性感，再爽一次！',
@@ -43,24 +39,7 @@ class Porn91IE(InfoExtractor):
             r'<div id="viewvideo-title">([^<]+)</div>', webpage, 'title')
         title = title.replace('\n', '')
 
-        # get real url
-        file_id = self._search_regex(
-            r'so.addVariable\(\'file\',\'(\d+)\'', webpage, 'file id')
-        sec_code = self._search_regex(
-            r'so.addVariable\(\'seccode\',\'([^\']+)\'', webpage, 'sec code')
-        max_vid = self._search_regex(
-            r'so.addVariable\(\'max_vid\',\'(\d+)\'', webpage, 'max vid')
-        url_params = compat_urllib_parse_urlencode({
-            'VID': file_id,
-            'mp4': '1',
-            'seccode': sec_code,
-            'max_vid': max_vid,
-        })
-        info_cn = self._download_webpage(
-            'http://91porn.com/getfile.php?' + url_params, video_id,
-            'Downloading real video url')
-        video_url = compat_urllib_parse_unquote(self._search_regex(
-            r'file=([^&]+)&', info_cn, 'url'))
+        info_dict = self._parse_html5_media_entries(url, webpage, video_id)[0]
 
         duration = parse_duration(self._search_regex(
             r'时长:\s*</span>\s*(\d+:\d+)', webpage, 'duration', fatal=False))
@@ -68,11 +47,12 @@ class Porn91IE(InfoExtractor):
         comment_count = int_or_none(self._search_regex(
             r'留言:\s*</span>\s*(\d+)', webpage, 'comment count', fatal=False))
 
-        return {
+        info_dict.update({
             'id': video_id,
             'title': title,
-            'url': video_url,
             'duration': duration,
             'comment_count': comment_count,
             'age_limit': self._rta_search(webpage),
-        }
+        })
+
+        return info_dict
diff --git a/youtube_dl/extractor/vidio.py b/youtube_dl/extractor/vidio.py
index 4e4b4e38c..701bb1d01 100644
--- a/youtube_dl/extractor/vidio.py
+++ b/youtube_dl/extractor/vidio.py
@@ -49,8 +49,11 @@ class VidioIE(InfoExtractor):
             thumbnail = clip.get('image')
 
         m3u8_url = m3u8_url or self._search_regex(
-            r'data(?:-vjs)?-clip-hls-url=(["\'])(?P<url>.+?)\1', webpage, 'hls url')
-        formats = self._extract_m3u8_formats(m3u8_url, display_id, 'mp4', entry_protocol='m3u8_native')
+            r'data(?:-vjs)?-clip-hls-url=(["\'])(?P<url>(?!\1).+)\1',
+            webpage, 'hls url')
+        formats = self._extract_m3u8_formats(
+            m3u8_url, display_id, 'mp4', entry_protocol='m3u8_native')
+        self._sort_formats(formats)
 
         duration = int_or_none(duration or self._search_regex(
             r'data-video-duration=(["\'])(?P<duartion>\d+)\1', webpage, 'duration'))
diff --git a/youtube_dl/extractor/vidzi.py b/youtube_dl/extractor/vidzi.py
index d0556297e..e64873bce 100644
--- a/youtube_dl/extractor/vidzi.py
+++ b/youtube_dl/extractor/vidzi.py
@@ -42,14 +42,15 @@ class VidziIE(InfoExtractor):
         title = self._html_search_regex(
             r'(?s)<h2 class="video-title">(.*?)</h2>', webpage, 'title')
 
-        packed_codes = [mobj.group(0) for mobj in re.finditer(
-            PACKED_CODES_RE, webpage)]
-        for num, pc in enumerate(packed_codes, 1):
-            code = decode_packed_codes(pc).replace('\\\'', '\'')
+        codes = [webpage]
+        codes.extend([
+            decode_packed_codes(mobj.group(0)).replace('\\\'', '\'')
+            for mobj in re.finditer(PACKED_CODES_RE, webpage)])
+        for num, code in enumerate(codes, 1):
             jwplayer_data = self._parse_json(
                 self._search_regex(
                     r'setup\(([^)]+)\)', code, 'jwplayer data',
-                    default=NO_DEFAULT if num == len(packed_codes) else '{}'),
+                    default=NO_DEFAULT if num == len(codes) else '{}'),
                 video_id, transform_source=js_to_json)
             if jwplayer_data:
                 break
diff --git a/youtube_dl/extractor/xfileshare.py b/youtube_dl/extractor/xfileshare.py
index 1b5cd122a..13f8be6cb 100644
--- a/youtube_dl/extractor/xfileshare.py
+++ b/youtube_dl/extractor/xfileshare.py
@@ -17,24 +17,24 @@ from ..utils import (
 
 class XFileShareIE(InfoExtractor):
     _SITES = (
-        ('daclips.in', 'DaClips'),
-        ('filehoot.com', 'FileHoot'),
-        ('gorillavid.in', 'GorillaVid'),
-        ('movpod.in', 'MovPod'),
-        ('powerwatch.pw', 'PowerWatch'),
-        ('rapidvideo.ws', 'Rapidvideo.ws'),
-        ('thevideobee.to', 'TheVideoBee'),
-        ('vidto.me', 'Vidto'),
-        ('streamin.to', 'Streamin.To'),
-        ('xvidstage.com', 'XVIDSTAGE'),
-        ('vidabc.com', 'Vid ABC'),
-        ('vidbom.com', 'VidBom'),
-        ('vidlo.us', 'vidlo'),
+        (r'daclips\.(?:in|com)', 'DaClips'),
+        (r'filehoot\.com', 'FileHoot'),
+        (r'gorillavid\.(?:in|com)', 'GorillaVid'),
+        (r'movpod\.in', 'MovPod'),
+        (r'powerwatch\.pw', 'PowerWatch'),
+        (r'rapidvideo\.ws', 'Rapidvideo.ws'),
+        (r'thevideobee\.to', 'TheVideoBee'),
+        (r'vidto\.me', 'Vidto'),
+        (r'streamin\.to', 'Streamin.To'),
+        (r'xvidstage\.com', 'XVIDSTAGE'),
+        (r'vidabc\.com', 'Vid ABC'),
+        (r'vidbom\.com', 'VidBom'),
+        (r'vidlo\.us', 'vidlo'),
     )
 
     IE_DESC = 'XFileShare based sites: %s' % ', '.join(list(zip(*_SITES))[1])
     _VALID_URL = (r'https?://(?P<host>(?:www\.)?(?:%s))/(?:embed-)?(?P<id>[0-9a-zA-Z]+)'
-                  % '|'.join(re.escape(site) for site in list(zip(*_SITES))[0]))
+                  % '|'.join(site for site in list(zip(*_SITES))[0]))
 
     _FILE_NOT_FOUND_REGEXES = (
         r'>(?:404 - )?File Not Found<',
diff --git a/youtube_dl/extractor/yahoo.py b/youtube_dl/extractor/yahoo.py
index 4951414e9..38f82bf44 100644
--- a/youtube_dl/extractor/yahoo.py
+++ b/youtube_dl/extractor/yahoo.py
@@ -258,7 +258,7 @@ class YahooIE(InfoExtractor):
             return self.url_result(bc_url, BrightcoveLegacyIE.ie_key())
 
         # Look for Brightcove New Studio embeds
-        bc_url = BrightcoveNewIE._extract_url(webpage)
+        bc_url = BrightcoveNewIE._extract_url(self, webpage)
         if bc_url:
             return self.url_result(bc_url, BrightcoveNewIE.ie_key())
 
diff --git a/youtube_dl/options.py b/youtube_dl/options.py
index 2d2f5e47b..52309fb84 100644
--- a/youtube_dl/options.py
+++ b/youtube_dl/options.py
@@ -468,6 +468,10 @@ def parseOpts(overrideArguments=None):
         '--abort-on-unavailable-fragment',
         action='store_false', dest='skip_unavailable_fragments',
         help='Abort downloading when some fragment is not available')
+    downloader.add_option(
+        '--keep-fragments',
+        action='store_true', dest='keep_fragments', default=False,
+        help='Keep downloaded fragments on disk after downloading is finished; fragments are erased by default')
     downloader.add_option(
         '--buffer-size',
         dest='buffersize', metavar='SIZE', default='1024',
diff --git a/youtube_dl/socks.py b/youtube_dl/socks.py
index 0f5d7bdb2..5d4adbe72 100644
--- a/youtube_dl/socks.py
+++ b/youtube_dl/socks.py
@@ -193,9 +193,10 @@ class sockssocket(socket.socket):
 
         self._check_response_version(SOCKS5_VERSION, version)
 
-        if method == Socks5Auth.AUTH_NO_ACCEPTABLE:
+        if method == Socks5Auth.AUTH_NO_ACCEPTABLE or (
+                method == Socks5Auth.AUTH_USER_PASS and (not self._proxy.username or not self._proxy.password)):
             self.close()
-            raise Socks5Error(method)
+            raise Socks5Error(Socks5Auth.AUTH_NO_ACCEPTABLE)
 
         if method == Socks5Auth.AUTH_USER_PASS:
             username = self._proxy.username.encode('utf-8')
diff --git a/youtube_dl/utils.py b/youtube_dl/utils.py
index 2340bc306..91e235ff2 100644
--- a/youtube_dl/utils.py
+++ b/youtube_dl/utils.py
@@ -2103,13 +2103,16 @@ def dict_get(d, key_or_keys, default=None, skip_false_values=True):
 
 
 def try_get(src, getter, expected_type=None):
-    try:
-        v = getter(src)
-    except (AttributeError, KeyError, TypeError, IndexError):
-        pass
-    else:
-        if expected_type is None or isinstance(v, expected_type):
-            return v
+    if not isinstance(getter, (list, tuple)):
+        getter = [getter]
+    for get in getter:
+        try:
+            v = get(src)
+        except (AttributeError, KeyError, TypeError, IndexError):
+            pass
+        else:
+            if expected_type is None or isinstance(v, expected_type):
+                return v
 
 
 def encode_compat_str(string, encoding=preferredencoding(), errors='strict'):
@@ -2508,27 +2511,97 @@ def srt_subtitles_timecode(seconds):
 
 
 def dfxp2srt(dfxp_data):
+    LEGACY_NAMESPACES = (
+        ('http://www.w3.org/ns/ttml', [
+            'http://www.w3.org/2004/11/ttaf1',
+            'http://www.w3.org/2006/04/ttaf1',
+            'http://www.w3.org/2006/10/ttaf1',
+        ]),
+        ('http://www.w3.org/ns/ttml#styling', [
+            'http://www.w3.org/ns/ttml#style',
+        ]),
+    )
+
+    SUPPORTED_STYLING = [
+        'color',
+        'fontFamily',
+        'fontSize',
+        'fontStyle',
+        'fontWeight',
+        'textDecoration'
+    ]
+
     _x = functools.partial(xpath_with_ns, ns_map={
         'ttml': 'http://www.w3.org/ns/ttml',
-        'ttaf1': 'http://www.w3.org/2006/10/ttaf1',
-        'ttaf1_0604': 'http://www.w3.org/2006/04/ttaf1',
+        'tts': 'http://www.w3.org/ns/ttml#styling',
     })
 
+    styles = {}
+    default_style = {}
+
     class TTMLPElementParser(object):
-        out = ''
+        _out = ''
+        _unclosed_elements = []
+        _applied_styles = []
 
         def start(self, tag, attrib):
-            if tag in (_x('ttml:br'), _x('ttaf1:br'), 'br'):
-                self.out += '\n'
+            if tag in (_x('ttml:br'), 'br'):
+                self._out += '\n'
+            else:
+                unclosed_elements = []
+                style = {}
+                element_style_id = attrib.get('style')
+                if default_style:
+                    style.update(default_style)
+                if element_style_id:
+                    style.update(styles.get(element_style_id, {}))
+                for prop in SUPPORTED_STYLING:
+                    prop_val = attrib.get(_x('tts:' + prop))
+                    if prop_val:
+                        style[prop] = prop_val
+                if style:
+                    font = ''
+                    for k, v in sorted(style.items()):
+                        if self._applied_styles and self._applied_styles[-1].get(k) == v:
+                            continue
+                        if k == 'color':
+                            font += ' color="%s"' % v
+                        elif k == 'fontSize':
+                            font += ' size="%s"' % v
+                        elif k == 'fontFamily':
+                            font += ' face="%s"' % v
+                        elif k == 'fontWeight' and v == 'bold':
+                            self._out += '<b>'
+                            unclosed_elements.append('b')
+                        elif k == 'fontStyle' and v == 'italic':
+                            self._out += '<i>'
+                            unclosed_elements.append('i')
+                        elif k == 'textDecoration' and v == 'underline':
+                            self._out += '<u>'
+                            unclosed_elements.append('u')
+                    if font:
+                        self._out += '<font' + font + '>'
+                        unclosed_elements.append('font')
+                    applied_style = {}
+                    if self._applied_styles:
+                        applied_style.update(self._applied_styles[-1])
+                    applied_style.update(style)
+                    self._applied_styles.append(applied_style)
+                self._unclosed_elements.append(unclosed_elements)
 
         def end(self, tag):
-            pass
+            if tag not in (_x('ttml:br'), 'br'):
+                unclosed_elements = self._unclosed_elements.pop()
+                for element in reversed(unclosed_elements):
+                    self._out += '</%s>' % element
+                if unclosed_elements and self._applied_styles:
+                    self._applied_styles.pop()
 
         def data(self, data):
-            self.out += data
+            self._out += data
 
         def close(self):
-            return self.out.strip()
+            return self._out.strip()
 
     def parse_node(node):
         target = TTMLPElementParser()
@@ -2536,13 +2609,45 @@ def dfxp2srt(dfxp_data):
         parser.feed(xml.etree.ElementTree.tostring(node))
         return parser.close()
 
+    for k, v in LEGACY_NAMESPACES:
+        for ns in v:
+            dfxp_data = dfxp_data.replace(ns, k)
+
     dfxp = compat_etree_fromstring(dfxp_data.encode('utf-8'))
     out = []
-    paras = dfxp.findall(_x('.//ttml:p')) or dfxp.findall(_x('.//ttaf1:p')) or dfxp.findall(_x('.//ttaf1_0604:p')) or dfxp.findall('.//p')
+    paras = dfxp.findall(_x('.//ttml:p')) or dfxp.findall('.//p')
 
     if not paras:
         raise ValueError('Invalid dfxp/TTML subtitle')
 
+    repeat = False
+    while True:
+        for style in dfxp.findall(_x('.//ttml:style')):
+            style_id = style.get('id')
+            parent_style_id = style.get('style')
+            if parent_style_id:
+                if parent_style_id not in styles:
+                    repeat = True
+                    continue
+                styles[style_id] = styles[parent_style_id].copy()
+            for prop in SUPPORTED_STYLING:
+                prop_val = style.get(_x('tts:' + prop))
+                if prop_val:
+                    styles.setdefault(style_id, {})[prop] = prop_val
+        if repeat:
+            repeat = False
+        else:
+            break
+
+    for p in ('body', 'div'):
+        ele = xpath_element(dfxp, [_x('.//ttml:' + p), './/' + p])
+        if ele is None:
+            continue
+        style = styles.get(ele.get('style'))
+        if not style:
+            continue
+        default_style.update(style)
+
     for para, index in zip(paras, itertools.count(1)):
         begin_time = parse_dfxp_time_expr(para.attrib.get('begin'))
         end_time = parse_dfxp_time_expr(para.attrib.get('end'))
diff --git a/youtube_dl/version.py b/youtube_dl/version.py
index 480e04e06..e206501e1 100644
--- a/youtube_dl/version.py
+++ b/youtube_dl/version.py
@@ -1,3 +1,3 @@
 from __future__ import unicode_literals
 
-__version__ = '2017.04.17'
+__version__ = '2017.04.26'