Youtube Virus?

Did youtube get hit by another cross site scripting hack? I couldn’t find anything with google searching it…

Why i ask:
I made a slideshow for my boss’s kid’s birthday. I uploaded it to youtube so she could see it. she opened it on a work computer (a oops on her part) and then she said that she kept getting pop-ups saying that she has over 200 files infected with viruses…

I sense she got some kind of pop-up ads, of the fake virus scanner kind, but anyone know if youtube videos can have viruses? From the few articles i found, youtube converts the video codec to it’s flash format, which should destroy/disassemble most viruses. I could have had a virus in my video, but i doubt it

Probably it was because of malvertising(http://isc.sans.edu/diary.html?storyid=3727).