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.
Same with all of these other frontends like invidious, teddit, rimgo, bibliogram,
This you?
Besides which... it's well understood that all of these apps are brittle as in they stop working every other day when youtube changes whatever thing so they stop working.
In the case of newpipe for example, if you install from the app store or even f-droid the version there will be a few weeks old and just won't work. The best approach is to install the apk and allow it to update itself when a new version is released. I've been using newpipe for several years in this manner and it's very reliable.
Er go, if it doesn't work for you, you're doing it wrong.