I don't get it, it is both sped up and slowed down all the way through, it is really obviously deliberately slowed down to show off the effects and then sped up again, I really don't think there is any attempt there to obfuscate that its been slowed down and sped up
I mean, I get that the video has been sped up, I just don't think it has anything to do with them trying to "hide that it's running at 30fps"... if it takes 2 seconds to edit an ini file to unlock the framerate I'm sure that whoever at nvidia recorded the vids was capable of unlocking the frame rate, which would be much easier than spending ages going through editing a video