What YouTube modded client app do you recommend and why?

We talking computer? The I've got Invidious set up and it's awesome.

For Android, I use NewPipe.

NewPipe for android. You can't login with your account, but you can still subscribe to channels, make playlists, download videos, pop out videos, and there's no ads. You can also watch/listen to things from SoundCloud and PeerTube from the app.