how does putting the vide on chain, etc... gives the ability to verify if it's real or not? heard a lot of people talking about this, what's the best thing to read on the topic?

how does putting the vide on chain, etc... gives the ability to verify if it's real or not? heard a lot of people talking about this, what's the best thing to read on the topic?
https://twitter.com/shaunmmaguire/status/1758197940253000056

I think identifying real v. fake content itself will be AI driven.

Blockchain can be used to verify provenance and ownership but in terms of the content itself it comes down to trusting the initial party.