diff --git a/youtube_dl/extractor/extractors.py b/youtube_dl/extractor/extractors.py
index 7a1e0dad6..ea47b99f6 100644
--- a/youtube_dl/extractor/extractors.py
+++ b/youtube_dl/extractor/extractors.py
@@ -644,7 +644,7 @@ from .minhateca import MinhatecaIE
 from .ministrygrid import MinistryGridIE
 from .minoto import MinotoIE
 from .miomio import MioMioIE
-from .mit import TechTVMITIE, MITIE, OCWMITIE
+from .mit import TechTVMITIE, OCWMITIE
 from .mitele import MiTeleIE
 from .mixcloud import (
     MixcloudIE,
@@ -995,7 +995,6 @@ from .scrippsnetworks import ScrippsNetworksWatchIE
 from .seeker import SeekerIE
 from .senateisvp import SenateISVPIE
 from .sendtonews import SendtoNewsIE
-from .servingsys import ServingSysIE
 from .servus import ServusIE
 from .sevenplus import SevenPlusIE
 from .sexu import SexuIE
diff --git a/youtube_dl/extractor/mit.py b/youtube_dl/extractor/mit.py
index 1aea78d11..e1506a745 100644
--- a/youtube_dl/extractor/mit.py
+++ b/youtube_dl/extractor/mit.py
@@ -65,30 +65,6 @@ class TechTVMITIE(InfoExtractor):
         }
 
 
-class MITIE(TechTVMITIE):
-    IE_NAME = 'video.mit.edu'
-    _VALID_URL = r'https?://video\.mit\.edu/watch/(?P<title>[^/]+)'
-
-    _TEST = {
-        'url': 'http://video.mit.edu/watch/the-government-is-profiling-you-13222/',
-        'md5': '7db01d5ccc1895fc5010e9c9e13648da',
-        'info_dict': {
-            'id': '21783',
-            'ext': 'mp4',
-            'title': 'The Government is Profiling You',
-            'description': 'md5:ad5795fe1e1623b73620dbfd47df9afd',
-        },
-    }
-
-    def _real_extract(self, url):
-        mobj = re.match(self._VALID_URL, url)
-        page_title = mobj.group('title')
-        webpage = self._download_webpage(url, page_title)
-        embed_url = self._search_regex(
-            r'<iframe .*?src="(.+?)"', webpage, 'embed url')
-        return self.url_result(embed_url)
-
-
 class OCWMITIE(InfoExtractor):
     IE_NAME = 'ocw.mit.edu'
     _VALID_URL = r'^https?://ocw\.mit\.edu/courses/(?P<topic>[a-z0-9\-]+)'
diff --git a/youtube_dl/extractor/servingsys.py b/youtube_dl/extractor/servingsys.py
deleted file mode 100644
index c013d678f..000000000
--- a/youtube_dl/extractor/servingsys.py
+++ /dev/null
@@ -1,72 +0,0 @@
-from __future__ import unicode_literals
-
-from .common import InfoExtractor
-from ..utils import (
-    int_or_none,
-)
-
-
-class ServingSysIE(InfoExtractor):
-    _VALID_URL = r'https?://(?:[^.]+\.)?serving-sys\.com/BurstingPipe/adServer\.bs\?.*?&pli=(?P<id>[0-9]+)'
-
-    _TEST = {
-        'url': 'http://bs.serving-sys.com/BurstingPipe/adServer.bs?cn=is&c=23&pl=VAST&pli=5349193&PluID=0&pos=7135&ord=[timestamp]&cim=1?',
-        'info_dict': {
-            'id': '5349193',
-            'title': 'AdAPPter_Hyundai_demo',
-        },
-        'playlist': [{
-            'md5': 'baed851342df6846eb8677a60a011a0f',
-            'info_dict': {
-                'id': '29955898',
-                'ext': 'flv',
-                'title': 'AdAPPter_Hyundai_demo (1)',
-                'duration': 74,
-                'tbr': 1378,
-                'width': 640,
-                'height': 400,
-            },
-        }, {
-            'md5': '979b4da2655c4bc2d81aeb915a8c5014',
-            'info_dict': {
-                'id': '29907998',
-                'ext': 'flv',
-                'title': 'AdAPPter_Hyundai_demo (2)',
-                'duration': 34,
-                'width': 854,
-                'height': 480,
-                'tbr': 516,
-            },
-        }],
-        'params': {
-            'playlistend': 2,
-        },
-        '_skip': 'Blocked in the US [sic]',
-    }
-
-    def _real_extract(self, url):
-        pl_id = self._match_id(url)
-        vast_doc = self._download_xml(url, pl_id)
-
-        title = vast_doc.find('.//AdTitle').text
-        media = vast_doc.find('.//MediaFile').text
-        info_url = self._search_regex(r'&adData=([^&]+)&', media, 'info URL')
-
-        doc = self._download_xml(info_url, pl_id, 'Downloading video info')
-        entries = [{
-            '_type': 'video',
-            'id': a.attrib['id'],
-            'title': '%s (%s)' % (title, a.attrib['assetID']),
-            'url': a.attrib['URL'],
-            'duration': int_or_none(a.attrib.get('length')),
-            'tbr': int_or_none(a.attrib.get('bitrate')),
-            'height': int_or_none(a.attrib.get('height')),
-            'width': int_or_none(a.attrib.get('width')),
-        } for a in doc.findall('.//AdditionalAssets/asset')]
-
-        return {
-            '_type': 'playlist',
-            'id': pl_id,
-            'title': title,
-            'entries': entries,
-        }
diff --git a/youtube_dl/extractor/twitch.py b/youtube_dl/extractor/twitch.py
index 0500e33a6..ca7676fe2 100644
--- a/youtube_dl/extractor/twitch.py
+++ b/youtube_dl/extractor/twitch.py
@@ -248,7 +248,7 @@ class TwitchVodIE(TwitchItemBaseIE):
                     https?://
                         (?:
                             (?:(?:www|go|m)\.)?twitch\.tv/(?:[^/]+/v(?:ideo)?|videos)/|
-                            player\.twitch\.tv/\?.*?\bvideo=v
+                            player\.twitch\.tv/\?.*?\bvideo=v?
                         )
                         (?P<id>\d+)
                     '''
@@ -306,6 +306,9 @@ class TwitchVodIE(TwitchItemBaseIE):
     }, {
         'url': 'https://www.twitch.tv/northernlion/video/291940395',
         'only_matching': True,
+    }, {
+        'url': 'https://player.twitch.tv/?video=480452374',
+        'only_matching': True,
     }]
 
     def _real_extract(self, url):