**traverse_obj(player_meta, ('initial_event_info', {
'alt_title': ('title', {str}),
})),
- 'thumbnails': [{'url': url, 'id': url_basename(url)} for url in thumbnail_urls if url_or_none(url)]
+ 'thumbnails': [{'url': url, 'id': url_basename(url)} for url in thumbnail_urls if url_or_none(url)],
}