old_contents: # coding: utf-8
  from __future__ import unicode_literals
  
  import re
  
  from .common import InfoExtractor
  from ..compat import compat_parse_qs
  from ..utils import ExtractorError
  
  
  class BokeCCBaseIE(InfoExtractor):
      def _extract_bokecc_formats(self, webpage, video_id, format_id=None):
          player_params_str = self._html_search_regex(
              r'<(?:script|embed)[^>]+src="http://p\.bokecc\.com/player\?([^"]+)',
              webpage, 'player params')
  
          player_params = compat_parse_qs(player_params_str)
  
          info_xml = self._download_xml(
              'http://p.bokecc.com/servlet/playinfo?uid=%s&vid=%s&m=1' % (
                  player_params['siteid'][0], player_params['vid'][0]), video_id)
  
          formats = [{
              'format_id': format_id,
              'url': quality.find('./copy').attrib['playurl'],
              'preference': int(quality.attrib['value']),
          } for quality in info_xml.findall('./video/quality')]
  
          self._sort_formats(formats)
  
          return formats
  
  
  class BokeCCIE(BokeCCBaseIE):
      _IE_DESC = 'CC视频'
      _VALID_URL = r'https?://union\.bokecc\.com/playvideo\.bo\?(?P<query>.*)'
  
      _TESTS = [{
          'url': 'http://union.bokecc.com/playvideo.bo?vid=E44D40C15E65EA30&uid=CD0C5D3C8614B28B',
          'info_dict': {
              'id': 'CD0C5D3C8614B28B_E44D40C15E65EA30',
              'ext': 'flv',
              'title': 'BokeCC Video',
          },
      }]
  
      def _real_extract(self, url):
          qs = compat_parse_qs(re.match(self._VALID_URL, url).group('query'))
          if not qs.get('vid') or not qs.get('uid'):
              raise ExtractorError('Invalid URL', expected=True)
  
          video_id = '%s_%s' % (qs['uid'][0], qs['vid'][0])
  
          webpage = self._download_webpage(url, video_id)
  
          return {
              'id': video_id,
              'title': 'BokeCC Video',  # no title provided in the webpage
              'formats': self._extract_bokecc_formats(webpage, video_id),
          }
  
new_contents: # coding: utf-8
  from __future__ import unicode_literals
  
  import re
  
  from .common import InfoExtractor
  from ..compat import compat_parse_qs
  from ..utils import ExtractorError
  
  
  class BokeCCBaseIE(InfoExtractor):
      def _extract_bokecc_formats(self, webpage, video_id, format_id=None):
          player_params_str = self._html_search_regex(
              r'<(?:script|embed)[^>]+src=(?P<q>["\'])(?:https?:)?//p\.bokecc\.com/(?:player|flash/player\.swf)\?(?P<query>.+?)(?P=q)',
              webpage, 'player params', group='query')
  
          player_params = compat_parse_qs(player_params_str)
  
          info_xml = self._download_xml(
              'http://p.bokecc.com/servlet/playinfo?uid=%s&vid=%s&m=1' % (
                  player_params['siteid'][0], player_params['vid'][0]), video_id)
  
          formats = [{
              'format_id': format_id,
              'url': quality.find('./copy').attrib['playurl'],
              'preference': int(quality.attrib['value']),
          } for quality in info_xml.findall('./video/quality')]
  
          self._sort_formats(formats)
  
          return formats
  
  
  class BokeCCIE(BokeCCBaseIE):
      _IE_DESC = 'CC视频'
      _VALID_URL = r'https?://union\.bokecc\.com/playvideo\.bo\?(?P<query>.*)'
  
      _TESTS = [{
          'url': 'http://union.bokecc.com/playvideo.bo?vid=E0ABAE9D4F509B189C33DC5901307461&uid=FE644790DE9D154A',
          'info_dict': {
              'id': 'FE644790DE9D154A_E0ABAE9D4F509B189C33DC5901307461',
              'ext': 'flv',
              'title': 'BokeCC Video',
          },
      }]
  
      def _real_extract(self, url):
          qs = compat_parse_qs(re.match(self._VALID_URL, url).group('query'))
          if not qs.get('vid') or not qs.get('uid'):
              raise ExtractorError('Invalid URL', expected=True)
  
          video_id = '%s_%s' % (qs['uid'][0], qs['vid'][0])
  
          webpage = self._download_webpage(url, video_id)
  
          return {
              'id': video_id,
              'title': 'BokeCC Video',  # no title provided in the webpage
              'formats': self._extract_bokecc_formats(webpage, video_id),
          }
  
subject: improve player params extraction(closes #22638)