Courtesy of eMarketer

According to eMarketer, one-third of the total US population over the age of 3 viewed video on the web at least monthly in 2006.

There were will be 108 million U.S. internet video users this year, and 157 million by 2010. And according to Strategy Analytics, video-download sales made through sites like iTunes are expected to grow from $298 million to a $1.5 billion industry.

"2007 will be remembered as the year in which online sales of prerecorded video finally become a real business," said Martin Olausson of Strategy Analytics. "Just like with music, online delivery of video content is now emerging as a viable and increasingly important distribution channel for content owners."

By 2010, the report estimates, global revenues from online video sales, rentals and subscriptions will reach $5.9 billion, accounting for 8 percent of total home video industry revenues.