I downloaded an asx file ( it was a pepsi commercial I never saw with Pink, Britney Spears and Beyonce dressed in gladiator gear and singing "we will rock you" by queen) and an mpeg of the same commercial. The asx file is quite small but it has the same play time as the mpeg which is quite large. Is this because it links to a source somewhere on the net to play the content? If so, once it has been played is the content placed somewhere on my system?