Who is the pornstar that appears in this video ?

A Hungarian Pepsi commercial from the late 90s, known for the line: "Szia, Kata vagyok! Van még egy Pepsid?" ("Hi, I'm Kata! Do you have another Pepsi?" ). This commercial was edited together with a pornographic clip.
Who is the girl in the thumbnail? Who is the girl in the porn scene? I did my research and discovered that the ad is Hungarian (from late 90s) . Starring , David Spáh (an actor; there’s a 99.9999...% chance he isn't the guy in the porn , obsviously not), Kata Dobó (the curly-haired redhead who appears at the end saying that line in Hungarian — that makes this small film known for, at least in Hungary, I think) ... and Kiss Piroska (or Piroska Kiss), the brunette , long straight hair , looking through a magnfying glass , who (the editor) tries to make us believe she’s the girl who had sex in the porn video. But not only did I strongly suspect it wasn't her, I think it’s almost obvious that it isn't. So, who is the girl shown having sex in the porn video? The woman from that thumbnail (from video) ?