It is censorship-resistent through redundancy. That means it becomes more resistent, the more nodes there are, and the more geographically and legally-distributed the nodes are. It does not mean that a node can't be attacked with lawfare. Also, a media server is not a relay. Nostr is a protocol that covers relays. Blossom is the closest thing we have to a media server protocol, so help out by running a blossom server.