There’s a few options

Newpipe, uses it’s own extractor, also can act as a player for SoundCloud and Peertube, there’s also a fork with SponsorBlock: newpipe.net

Libretube, uses the Piped api, generally seen as the one with the best UI: github.com/libre-tube/LibreTube

Clipious, uses the Invidious api: github.com/lamarios/clipious

Could also watch videos in a browser from an Invidious or Piped instance I guess