I’d also like to point out that mpv has youtube-dl built-in (and can also use the cooler fork, yt-dlp). You can open YouTube links directly in mpv and they will play with no bullshit. It can even pull 4K streams.
There are browser plugins that let you open links directly in external programs like mpv, although they are a bit of a hassle to set up (especially if you are on Ubuntu with their godforsaken Snaps).