Is he talking about ActivityPub[1, 2] and the Fediverse[3]?
Just look at Mastodon[4, 5] if you're looking for something like twitter without the centralization and the corporate greed.
[1] https://en.wikipedia.org/wiki/ActivityPub [2] https://activitypub.rocks [3] https://en.wikipedia.org/wiki/Fediverse [4] https://en.wikipedia.org/wiki/Mastodon_(software) [5] https://joinmastodon.org/servers