YouTube's Greatest Hits

Did either Chad or Steve realize what a phenomenon YouTube would become? "No. Not at all," Chad says. "We never imagined sitting here on The Oprah Show."

Chad and Steve talk to Oprah after the show about what a typical day is like and how they've redefined fame.

Only two years after Chad and Steve founded YouTube, the site is worth $1.6 billion. Still, they say, the money hasn't affected their dream.

"Not much has changed because we still feel there's so much we need to do, so much we need to do to improve the product and kind of define this video market to provide opportunities for people around the world. So we're not done," Chad says.