SimplestBitcoinBook on Nostr: Interesting thanks! #[3] #[4] any idea what's up here? I thought it would be the ...

Interesting thanks! jb55 (npub1xts…kk5s) nostr.build (npub1nxy…avr7) any idea what's up here? I thought it would be the client that would or would not render a video, or is it somehow the relay?