From Cynopsis:
It looks as though MySpace isn't the only major media site attracting phishers. Malware in the form of Zlob adware has been discovered embedded in YouTube videos. Attackers are using a fake video link to initiate a p#rn adware program that results in the installation of data-stealing code. Zlob Media's spyware codec was the most prevalent threat to PC users in the month of May, according to Sunbelt Software's Threat Research Center.