If you only place them on your blossom relay; then your bandwidth would take the hit for the video playback.
But that’s why step 4 was sync it across multiple relays so they help relay that video traffic too.
Bloom.btcforplebs.com can do this sync. Shoutout to nostr:npub1m2jphmdkskgnvwl5gplksl9e0zwv2sldqf9mwlpz6tyymz84g9fsqr3wgu for making it!
to add to that nostr:nprofile1qyxhwumn8ghj7cnjvghxjme0qyt8wumn8ghj7etyv4hzumn0wd68ytnvv9hxgtcqyzgzplnc277j8yk4qjlwh8jksam02pmcf76mt22277677xhf0qpgjun40u6 i would upload big files you want to share to big public (blossom.primal.net) or paid (satellite.earth, nostr.build, etc) servers.
you can def serve them from your own relay (i like haven), but that will depend on your server's bandwidth limitations.
I personally like to keep keep copies of certain files on my own server but usually share a mirrored version from another. really part of the reason i'm building Bloom (thanks nostr:nprofile1qyw8wumn8ghj7mr0vajkutnzw33kvmmjwpkx2cnn9e3k7mf0qyw8wumn8ghj7un9d3shjtnzw33kvmmjwpkx2cnn9e3k7mf0qqsxr0mepvsfftasxj2uncfk4nmpt0s0enpvh9d44na47mxwlcvtqcs0k7agp lol), and i made it super simple to share files right to nostr from there (bloomapp.me shameless plug).
