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.
I also want to drop Grayjay in here. It supports YouTube and can also be used to view other platforms like Twitch, Odysee, PeerTube, etc. It uses plugins, so you can develop a plugin for the video platform you want to be able to use in Grayjay. Grayjay also has this Polycentric “decentralized” database so that you can comment and like the videos in those aforementioned platforms.
Anyone know of something for Windows or Linux like grayjay that access multiple platforms?
They’re working on a desktop app. But otherwise, no.