Have you tried using IPFS? It doesn't do this, this fast.
Discussion
nostr:npub1gcxzte5zlkncx26j68ez60fzkvtkm9e0vrwdcvsjakxf9mu9qewqlfnj5z nostr:npub108pv4cg5ag52nq082kd5leu9ffrn2gdg6g4xdwatn73y36uzplmq9uyev6 oh my god people are really using nostr as a transport for files
We have been doing this for months now. :)