This was the biggest problem with PeerTube. For Mastodon I clicked the big "join" button on the website and filtered by technology > foss and fosstodon.org was the largest option and seems to have a great community. For PeerTube trying to do the same thing I found some small technology instance with a few hundred videos. I chose peervideo.club because it's the 4th largest (so I'd be in good company if it's taken down) and seemed to be the largest English focused instance. From their about, "Peer Video Club is a chill PeerTube instance most likely just for testing. How long we plan to maintain this instance: ¯\(ツ)/¯. How we will pay for this instance: Owners's own funds". Doesn't seem like a pillar of stability.

My understanding is I could backup (no plans), and restore to another instance. To take my followers with me I would have to leave peervideo.club in a more planned way and set my account to redirect to another. No idea how long the redirect would have to stay up for most of my subscribers' instances to get the message. Even with federated you need some degree of trust that you won't be kicked off or have you instance shut down with no warning.