Video Internet usage adds 16 million unique users in 1Q09 (to 131 million) and monthly time spent viewing leaps up 53.2% to 3 hours a month. That number is above 5 hours a month for the 18-24 age demo, and not far behind at 4:32 for the 25-34 age demo.

With broadband levels increasing in the U.S., online video audiences will continue to grow as consumers begin to upgrade their PCs to support increased video consumption. Growth also hinges on how broadband channels promote themselves. As sites continue to aggressively market themselves, they’ll increase the levels of growth by creating demand.

http://blog.nielsen.com/nielsenwire/wp-content/uploads/2009/05/nielsen_threescreenreport_q109.pdf