Another option is to use my script to open it in MPV or a compatible player.
The one that says, “Open Links in MPV”.
PS: Specifically created this script because for the last few months FreeTube hasn’t been at its best, so I decided I’d just use it for subscriptions and use MPV for playback.
That said, I think FreeTube has built-in MPV support in its settings, so the script is probably not needed when copying links from within FreeTube.
Outside FreeTube, though — been useful for me.
Edit: It is actually useful in FreeTube for playlists. Copy the link for a playlist, and it opens in MPV, then you get all the functions of MPV.