That puts Netflix above HTTP websites (18 percent), BitTorrent (11 percent), and YouTube (10 percent) as a source of downstream traffic during peak times in North America. (BitTorrent still accounts for half of all upstream traffic). As whole, “real-time entertainment” (which is mostly video streaming, but also includes streaming music) accounted for 49 percent of downstream traffic in March, 2011, versus 19 percent for P2P file sharing, and 17 percent for Web browsing.
Video files are so big that it does not take much usage for it to take over in terms of bandwidth consumed. But these numbers definitely point to a future where video accounts for more and more of the traffic on the Internet. As recently as last November, Web video alone accounted for an estimated 37 percent of Internet traffic."