On the other hand, why would you choose to use spotify API for a start? Spotify doesn't have nearly the quantity of available music that Youtube has.
So many times when I try to find some music on my partner's spotify account it is just not there, and I give up and we listen to it via newpipe or freetube.
I would find it pointless to make music playlist on Youtube. Stuff gets taken down too easily, skits are prevalent, and theres so many accounts that just rip off music from other people. If it can't be on Spotify, I'm better off finding it on Soundcloud.
Huh my experience is the total opposite. I try to download my Spotify playlists from YouTube Music because its easier but half the stuff isn't there or incorrect versions etc.
So many times when I try to find some music on my partner's spotify account it is just not there, and I give up and we listen to it via newpipe or freetube.