+ xsrf_token = self._search_regex(
+ r'([\'"])XSRF_TOKEN\1\s*:\s*([\'"])(?P<xsrf_token>[A-Za-z0-9+/=]+)\2',
+ video_webpage, 'xsrf token', group='xsrf_token', fatal=False)
+ invideo_url = try_get(
+ player_response, lambda x: x['annotations'][0]['playerAnnotationsUrlsRenderer']['invideoUrl'], compat_str)
+ if xsrf_token and invideo_url:
+ xsrf_field_name = self._search_regex(
+ r'([\'"])XSRF_FIELD_NAME\1\s*:\s*([\'"])(?P<xsrf_field_name>\w+)\2',
+ video_webpage, 'xsrf field name',
+ group='xsrf_field_name', default='session_token')
+ video_annotations = self._download_webpage(
+ self._proto_relative_url(invideo_url),
+ video_id, note='Downloading annotations',
+ errnote='Unable to download video annotations', fatal=False,
+ data=urlencode_postdata({xsrf_field_name: xsrf_token}))