diff --git a/ChangeLog b/ChangeLog
index a0072ffe3..7b3c6c6cf 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+version <unreleased>
+
+Extractors
++ [niconico] Support sp subdomain (#13494)
+
+
 version 2017.06.25
 
 Core
diff --git a/youtube_dl/extractor/niconico.py b/youtube_dl/extractor/niconico.py
index 8baac23e4..f268a72d5 100644
--- a/youtube_dl/extractor/niconico.py
+++ b/youtube_dl/extractor/niconico.py
@@ -83,9 +83,12 @@ class NiconicoIE(InfoExtractor):
             'uploader_id': '312',
         },
         'skip': 'The viewing period of the video you were searching for has expired.',
+    }, {
+        'url': 'http://sp.nicovideo.jp/watch/sm28964488?ss_pos=1&cp_in=wt_tg',
+        'only_matching': True,
     }]
 
-    _VALID_URL = r'https?://(?:www\.|secure\.)?nicovideo\.jp/watch/(?P<id>(?:[a-z]{2})?[0-9]+)'
+    _VALID_URL = r'https?://(?:www\.|secure\.|sp\.)?nicovideo\.jp/watch/(?P<id>(?:[a-z]{2})?[0-9]+)'
     _NETRC_MACHINE = 'niconico'
 
     def _real_initialize(self):
diff --git a/youtube_dl/extractor/pandatv.py b/youtube_dl/extractor/pandatv.py
index 133cc9b88..c86d70771 100644
--- a/youtube_dl/extractor/pandatv.py
+++ b/youtube_dl/extractor/pandatv.py
@@ -10,13 +10,13 @@ from ..utils import (
 
 class PandaTVIE(InfoExtractor):
     IE_DESC = '熊猫TV'
-    _VALID_URL = r'http://(?:www\.)?panda\.tv/(?P<id>[0-9]+)'
-    _TEST = {
-        'url': 'http://www.panda.tv/10091',
+    _VALID_URL = r'https?://(?:www\.)?panda\.tv/(?P<id>[0-9]+)'
+    _TESTS = [{
+        'url': 'http://www.panda.tv/66666',
         'info_dict': {
-            'id': '10091',
+            'id': '66666',
             'title': 're:.+',
-            'uploader': '囚徒',
+            'uploader': '刘杀鸡',
             'ext': 'flv',
             'is_live': True,
         },
@@ -24,13 +24,16 @@ class PandaTVIE(InfoExtractor):
             'skip_download': True,
         },
         'skip': 'Live stream is offline',
-    }
+    }, {
+        'url': 'https://www.panda.tv/66666',
+        'only_matching': True,
+    }]
 
     def _real_extract(self, url):
         video_id = self._match_id(url)
 
         config = self._download_json(
-            'http://www.panda.tv/api_room?roomid=%s' % video_id, video_id)
+            'https://www.panda.tv/api_room?roomid=%s' % video_id, video_id)
 
         error_code = config.get('errno', 0)
         if error_code is not 0:
@@ -74,7 +77,7 @@ class PandaTVIE(InfoExtractor):
                 continue
             for pref, (ext, pl) in enumerate((('m3u8', '-hls'), ('flv', ''))):
                 formats.append({
-                    'url': 'http://pl%s%s.live.panda.tv/live_panda/%s%s%s.%s'
+                    'url': 'https://pl%s%s.live.panda.tv/live_panda/%s%s%s.%s'
                     % (pl, plflag1, room_key, live_panda, suffix[quality], ext),
                     'format_id': '%s-%s' % (k, ext),
                     'quality': quality,