Use bittorrent. Every viewer is also a source. The more people watch, the less your servers are loaded. Bittorrent is built towards "offline" viewing. Try Peer

Use bittorrent. Every viewer is also a source. The more people watch, the less your servers are loaded. Bittorrent is built towards "offline" viewing. Try Peertube for a stack that is more built for streaming and has bittorrent sharing built-in (actually webtorrent, because the browser doesn't speak raw TCP or UDP, but the idea is the same)