I just read an interesting article on yahoo which tells how hackers are now using fake youtube pages to redirect youtube viewers to a fake page that downloads either spyware or a virus on the persons computer.
Recently I noticed that youtube has allowed users to place hotspots on a video and allow the viewer to go to that particular site. This can be helpful for those who want to direct people to a clean site but I can see how a hacker would user this new method to direct users to a site that can download a virus or malware onto your computer.
Its an interesting article so check it out.
Youtube Scam article.