What is Nostr's topology?

Imagine it like a bunch of websites (relays) serving different content. You connect to specific relays for the content you want, like an open market of data exchange.

nostr:npub1az9xj85cmxv8e9j9y80lvqp97crsqdu2fpu3srwthd99qfu9qsgstam8y8  and nostr:npub180cvv07tjdrrgpa0j7j7tmnyl2yr6yr7l8j4s3evf6u64th6gkwsyjh6w6 explain how nostr's topology results in its decentralization, in BR080.
https://m.primal.net/LbAQ.mov