old_contents: # coding: utf-8
  from __future__ import unicode_literals
  
  import re
  
  from .common import InfoExtractor
  
  
  class InaIE(InfoExtractor):
      _VALID_URL = r'https?://(?:www\.)?ina\.fr/video/(?P<id>I?[A-Z0-9]+)'
      _TEST = {
          'url': 'http://www.ina.fr/video/I12055569/francois-hollande-je-crois-que-c-est-clair-video.html',
          'md5': 'a667021bf2b41f8dc6049479d9bb38a3',
          'info_dict': {
              'id': 'I12055569',
              'ext': 'mp4',
              'title': 'François Hollande "Je crois que c\'est clair"',
          }
      }
  
      def _real_extract(self, url):
          mobj = re.match(self._VALID_URL, url)
  
          video_id = mobj.group('id')
          mrss_url = 'http://player.ina.fr/notices/%s.mrss' % video_id
          info_doc = self._download_xml(mrss_url, video_id)
  
          self.report_extraction(video_id)
  
          video_url = info_doc.find('.//{http://search.yahoo.com/mrss/}player').attrib['url']
  
          return {
              'id': video_id,
              'url': video_url,
              'title': info_doc.find('.//title').text,
          }
  
new_contents: # coding: utf-8
  from __future__ import unicode_literals
  
  from .common import InfoExtractor
  from ..utils import (
      int_or_none,
      strip_or_none,
      xpath_attr,
      xpath_text,
  )
  
  
  class InaIE(InfoExtractor):
      _VALID_URL = r'https?://(?:www\.)?ina\.fr/video/(?P<id>[A-Z0-9_]+)'
      _TESTS = [{
          'url': 'http://www.ina.fr/video/I12055569/francois-hollande-je-crois-que-c-est-clair-video.html',
          'md5': 'a667021bf2b41f8dc6049479d9bb38a3',
          'info_dict': {
              'id': 'I12055569',
              'ext': 'mp4',
              'title': 'François Hollande "Je crois que c\'est clair"',
              'description': 'md5:3f09eb072a06cb286b8f7e4f77109663',
          }
      }, {
          'url': 'https://www.ina.fr/video/S806544_001/don-d-organes-des-avancees-mais-d-importants-besoins-video.html',
          'only_matching': True,
      }]
  
      def _real_extract(self, url):
          video_id = self._match_id(url)
          info_doc = self._download_xml(
              'http://player.ina.fr/notices/%s.mrss' % video_id, video_id)
          item = info_doc.find('channel/item')
          title = xpath_text(item, 'title', fatal=True)
          media_ns_xpath = lambda x: self._xpath_ns(x, 'http://search.yahoo.com/mrss/')
          content = item.find(media_ns_xpath('content'))
  
          get_furl = lambda x: xpath_attr(content, media_ns_xpath(x), 'url')
          formats = []
          for q, w, h in (('bq', 400, 300), ('mq', 512, 384), ('hq', 768, 576)):
              q_url = get_furl(q)
              if not q_url:
                  continue
              formats.append({
                  'format_id': q,
                  'url': q_url,
                  'width': w,
                  'height': h,
              })
          if not formats:
              formats = [{
                  'url': get_furl('player') or content.attrib['url'],
              }]
  
          thumbnails = []
          for thumbnail in content.findall(media_ns_xpath('thumbnail')):
              thumbnail_url = thumbnail.get('url')
              if not thumbnail_url:
                  continue
              thumbnails.append({
                  'url': thumbnail_url,
                  'height': int_or_none(thumbnail.get('height')),
                  'width': int_or_none(thumbnail.get('width')),
              })
  
          return {
              'id': video_id,
              'formats': formats,
              'title': title,
              'description': strip_or_none(xpath_text(item, 'description')),
              'thumbnails': thumbnails,
          }
  
subject: improve extraction