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

My main issue with Mastodon is that your identity is tied to whatever instance you signed up with. So if I sign up at example.social I will be [email protected]. If the moderators ban me or the instance stops working I am losing all my tweets and followers.

Ideally you would sign up with your own domain ([email protected]) and point some dns records to whichever instance you want, this way you stay flexible and you own your identity.

There is a github issue for this that is open for 5 years but not much has been done https://github.com/mastodon/mastodon/issues/2668

https://github.com/nostr-protocol/nostr

It solves this problem of being tied to a domain.