Who is the #1 video search site on the Internet? Is it Google, Yahoo!, or Microsoft? No. According to data released Wednesday by Hitwise, YouTube.com has captured 43 percent of all visits to video search sites during the week ending May 20.

YouTube.com has seen its share of visits increase by 160 percent in the last three months, but is closely trailed by MySpace Videos. MySpace's video search site has the second-highest share in the space at 24.2 percent.

Video search is growing at a rapid rate, the report said -- the overall share of total Internet activity for the top 10 video search sites has increased by 164 percent in the past three months. YouTube, which has a Web 2.0 cachet in the same vein as sites like Flickr and del.icio.us, launched its video search and sharing functions in December 2005, while competitor MySpace Video launched more recently, in January 2006.