How big is YouTube? It is far larger than the next 64 video-sharing sites combined, according to Hitwise, an Internet Audience Measurement company.

Google's acquisition and site promotion hiked its traffic 70% from January through May, compared to an 8% rise at other video sites. YouTube's market share is estimated at over 60%. The share of other leading sties - News Corp. MySpace 16%, Google Video 8%, Yahoo 3%, Microsoft MSN 2%, Metacafe 1%, Time Warner AOL .9%, and Veoh 0.86%.