We’ve been seeing this for a while now — a file starts to play, then is interrupted with a message that the user needs to install VideoC.  

Of course, there is no such player called VideoC.  Instead, what you get is a big, fat nasty payload of spyware.

Here is an example on a porn site that spyware researcher Patrick Jordan saw today:

Videoc21adfasdfsf

Alex Eckelberry