PeerTube doesn’t have much in the way of discoverability (yet) but its killer feature is the integration with the rest of the Fediverse, so people watch, share and comment on your videos from all over Mastodon etc (as long as you tag them correctly, anyway).
This does make the view numbers on PeerTube itself look small, so if you’re in it for the numbers it’s not the way to go. But it’s easy enough to upload there and use as a backup for your YT channel, if nothing else.