Quoted from Crash:Wow I wonder how he managed to do it. Not saying there isn't encryption though. Or it seriously could be as simple as swapping a hard drive from a 75th game!
Notice how you never see any actual gameplay screens whatsoever? Sometimes the simplest answer is the correct one. For example, I could easily duplicate the total content of that video right now simply by plugging a different computer into the VGA cable and playing back the 75th banner video file... which is accessible to anyone with the v1.22 delta update file.
Not saying that's what happened, but whomever posted that didn't go out of their way to prove that anything "special" was going on.