old_contents: from __future__ import unicode_literals
  
  import re
  
  from .common import InfoExtractor
  from .ooyala import OoyalaIE
  
  
  class TeachingChannelIE(InfoExtractor):
      _VALID_URL = r'https?://(?:www\.)?teachingchannel\.org/videos/(?P<title>.+)'
  
      _TEST = {
          'url': 'https://www.teachingchannel.org/videos/teacher-teaming-evolution',
          'md5': '3d6361864d7cac20b57c8784da17166f',
          'info_dict': {
              'id': 'F3bnlzbToeI6pLEfRyrlfooIILUjz4nM',
              'ext': 'mp4',
              'title': 'A History of Teaming',
              'description': 'md5:2a9033db8da81f2edffa4c99888140b3',
              'duration': 422.255,
          },
          'params': {
              'skip_download': True,
          },
          'add_ie': ['Ooyala'],
      }
  
      def _real_extract(self, url):
          mobj = re.match(self._VALID_URL, url)
          title = mobj.group('title')
          webpage = self._download_webpage(url, title)
          ooyala_code = self._search_regex(
              r'data-embed-code=\'(.+?)\'', webpage, 'ooyala code')
  
          return OoyalaIE._build_url_result(ooyala_code)
  
new_contents: from __future__ import unicode_literals
  
  from .common import InfoExtractor
  
  
  class TeachingChannelIE(InfoExtractor):
      _VALID_URL = r'https?://(?:www\.)?teachingchannel\.org/videos?/(?P<id>[^/?&#]+)'
  
      _TEST = {
          'url': 'https://www.teachingchannel.org/videos/teacher-teaming-evolution',
          'info_dict': {
              'id': '3swwlzkT',
              'ext': 'mp4',
              'title': 'A History of Teaming',
              'description': 'md5:2a9033db8da81f2edffa4c99888140b3',
              'duration': 422,
              'upload_date': '20170316',
              'timestamp': 1489691297,
          },
          'params': {
              'skip_download': True,
          },
          'add_ie': ['JWPlatform'],
      }
  
      def _real_extract(self, url):
          display_id = self._match_id(url)
          webpage = self._download_webpage(url, display_id)
          mid = self._search_regex(
              r'(?:data-mid=["\']|id=["\']jw-video-player-)([a-zA-Z0-9]{8})',
              webpage, 'media id')
  
          return self.url_result('jwplatform:' + mid, 'JWPlatform', mid)
  
subject: fix extraction