Seems similar to PaddleOver [1] which was developed by Bittorrent inc a few years ago using their Btapp.js [2] library, unfortunately the PaddleOver site has expired and the code base hasn't been updated in a year.
It would be interesting to know if the developer looked at btapp.js and if so, why did he decide not to use it? Getting this technology web embeddable will go a long way to start making peer-to-peer a convenient method of downloading content vs directly downloading from a server, there's always going to be further hurdles to overcome with reliability in a case where the swarm lifetime is very short, but seeding with a few servers can help in that situation. If a web app could upload the torrent and data to a server to seed, then replicate it in a few locations it could be a decent DCDN.
[1] http://pwmckenna.com/2012/06/29/making-of-paddle-over.html