According to ClickZ, YouTube’s main navigation will soon be switched to “Movies, Music, Shows, and Videos. The first three tabs will display premium shows, clips, and movies from Google's network and studio partners, all of which will be monetized with in-stream advertising.”
Meanwhile, the user-generated content that was the original premise for the site will be relegated to the “Videos” tab. This new navigation makes YouTube considerably more like Hulu, who offers two main options in its navigation – TV and Movies – from the video site’s parent companies: NBC and News Corp.
Why would YouTube want to emulate Hulu, which, though relatively popular, is still just a fraction of the size of YouTube? The main reason is that YouTube has been somewhat infamously unable to generate much money considering the size of its audience, whereas Hulu is able to attract high-end advertisers both because of its agency ties and its lack of more difficult to monetize user-generated content.