For the last few years, the majority of traffic on the Internet was file sharing, or P2P. This would consist of traffic over things such as torrent, eMule, Limewire, and such. Now, your average HTTP page in a browser is back on top. But, it is not due to a sudden upsurge in people doing research, or anything like that. A good portion of the upsurge in HTTP traffic is thanks to streaming video over YouTube.

The numbers break up like this, HTTP now accounts for 46% of the traffic on the internet, with P2P coming in second at 37%. Of the HTTP traffic, only 45% is made up of traditional web pages which include text and graphics. 36% of the HTTP traffic is streaming media, 20% of which is YouTube videos.

If my math is correct, 9.2% of all traffic on the internet is from YouTube.