@youtubemusic if a song is in my downloaded playlists, why the heck can't I long press it and then go to album/artist/start radio based upon that song? For that matter, why can't I delete the song from the playlist by using the long press menu? Really frustrating and stupid.
This option is currently not available, but it's a good suggestion. Mind submitting this feature request here: https://yt.be/help/feedback ? This will help us prioritize the request.