PeerTube's federation protocol is fluid (everyone can choose who they want to follow), and based on <a target="_blank" rel="noopener noreferrer" href="https://activitypub.rocks">ActivityPub</a>: this opens the possibility to connect with tools like Mastodon for example.
Making it easier to access content, sharing power and responsibilities, opening up to contributions, generalizing live broadcasting thanks to peer-to-peer... PeerTube’s v3 aims to consolidate it as an alternative to Google-Youtube and Facebook-Live that is more and more convivial.