def _extract_vrv_formats(self, url, video_id, stream_format, audio_lang, hardsub_lang):
if not url or stream_format not in ('hls', 'dash'):
return []
def _extract_vrv_formats(self, url, video_id, stream_format, audio_lang, hardsub_lang):
if not url or stream_format not in ('hls', 'dash'):
return []