if you haven't used youtube-dl before, you should look into it or into an mpv based media player. personally i use Celluloid but i think there are better ones out there.
you can just put a link to a video in the playlist and it will stream it for you, without having to load any of youtube's (or any other website's) tracking stuff. also no ads! and no youtube comments! it even handles subtitles and stuff.
or if you know the command line a bit, you can use youtube-dl directly to download videos or playlists or even entire channels. going for a long train ride with no network connectivity? wanna binge Epithet Erased on the ride? or have a local backup of a tech tutorial channel? youtube-dl is the tool you want.