info_request.add_header('Content-Type', 'application/x-www-form-urlencoded')
         info_response = self._download_webpage(info_request, video_id, 'Downloading info webpage')
         if info_response is None:
         info_request.add_header('Content-Type', 'application/x-www-form-urlencoded')
         info_response = self._download_webpage(info_request, video_id, 'Downloading info webpage')
         if info_response is None: