I'm betting on webtorrent paired with seedboxes - your peer just has to serve whatever mp3/mp4 you're hosting to the first few clients, and as long as their browser windows are open they can help seed any viral growth, handling DDoS/hugs-of-death without issue. If there are multiple hosts in a community they can enter peering agreements and sync their seedboxes to keep media available, solving bitrot
if only I could figure out how to get paid to implement it