LibreTube - uses Piped as video source by default. Subscriptions and playlists can be created, all without actually interacting with YouTube.
Clipious - uses Invidious as the video source. Also allows for subscribing and accounts. Lesser known client
NewPipe - Gets the source directly from YT. Allows for subscribing and creating playlists
Additionally, there’s also ReVanced that lets you patch the regular YT app to include useful features.
you dont need root for these things. just download the fdroid apk from its website, open the apk (you probably need to allow installing third party apps in the settings, which come disabled by default these days), then search for libretube or newpipe inside fdroid after letting it download its app catalogue (it may seem confusing that fdroid seems empty at first, but you may just need to slide down to update and wait a second for it to download the catalogue).