I would bet $1000 that you didn't watch even the first 30 seconds of the video.
This guy in the video knows exactly what he's talking about.

Thanks for reiterating that NOSTR is not a blockchain and just a huge cluster of interconnected nodes storing redundant information. It's very easy to confuse that with blockchain because blockchain is basically the same concept except all nodes on blockchain store the exact same information while NOSTR does not.