NewPipe is an open source frontend app for YouTube that protects your privacy, while keeping the full YouTube experience. It has subscriptions, playlists, watch history, video and audio downloads, adblock, and more. All data is stored locally and can be manually exported, it does not use a Google account. This fork of NewPipe integrates the FOSS SponsorBlock extension, which automatically skips known sponsors inside videos (the database is crowdsourced).
Newpipe is amazing!