You can always look to implement webtorrent. It does not work everywhere, but it works very well.
Basically how it works it's that you have a streemable file, you make a torrent, and a javascript client on the browser it's capable of downloading and streaming it.
Going to need a significant amount of storage soon. eSATA it's significantly cheaper than a SAS enclosure + card.
I had thought that if i'm going to use a snapraid setup for these drives (to make it so only one drive it's active for any given opperation, it should work the same.