I've been encountering that same scam on a variety of porn sites. If they're asking you to install extra software, IT'S A VIRUS/SPYWARE/MALWARE!!! These creepy bastards rely on the horniness of the web surfer, but if you have any sense left while stroking at 400 rpm you'll realize that if it ain't using the regular set of codecs available to play mpg/avi/wmv then it's probably someone out to screw up your system. Don't give the bastards the satisfaction.