Since most videos on YouTube are streamed through Adobe Flash Player, which is a plug-in for your web browser, it is not surprising that hackers aim to make fake updates in order to reach the maximum number of users. When PC users click on the pop-up, which installs the fake update, the program will be able to steal passwords for online banking and other online payment sites and this way get hold of the users’ money.
The best known example of a fake Flash update was the Flashback Trojan Horse that attacked more than 600,000 Mac users a few years ago, but this is still a potential trap, which makes it one of the most lucrative scams on the internet.
http://www.youtube.com/watch?v=wZrFApzz0Mo&feature=youtu.be