I run Spectra Video at https://spectra.video/. We have gated signups: basically, someone fills out a request form, we review it, the account gets approved within a short turnaround time, and the user’s channel gets created.

There is a PeerTube plugin for premium subscriptions that does exactly this: https://github.com/kontrollanten/peertube-plugin-premium-users

It would be nice if there was an easy and straightforward way for instances to create their own shared indexes. There’s a feature for this in PeerTube, which I guess is supposed to act like instance following + a shared search catalogue. It would be handy to know how to easily make sort of the federation equivalent of a webring.

The devs are also working on a mobile app, which I think is something the platform is sorely missing.