PeerTubeify
PeerTubeify is a browser add-on available for Firefox and Chrome. It allows redirecting the user from any instance to the user's prefered instance. It also allows redirecting from a YouTube video to a PeerTube when that video is also uploaded to PeerTube. It searches the title of the YouTube video on the PeerTube network, as it assumes that the title would be the same.
Website: https://gitlab.com/Cha_deL/peertubeify
Licence: GNU GPL version 3