This is mentioned in the comments on youtube as well. The reply from author is "That's because there was a half-second near the end in my driveway where the thinning of my hair was much more visible than I was comfortable with, so I edited that part out."

I feel like Occam's razor applies here in a non-intuitive way.

Either he:

1. Recorded a video of him driving a car and frantically pressing the horn

2. Made a screen capture of Doom that matches the gun fire, turns, and weapon changes perfectly to his car video

3. Did some video editing to superimpose the video including several cases where his thumb goes over the screen while shifting

Or....

1. He put software on the car console (which is pretty much a full computer)

2. He actually mapped the controls to data being read from the onboard computer

I mean, I couldn't do this... one I don't know how to write software for a Porsche console and two I can't afford a Porsche :-P but faking it seems like way more work and worse ROI than actually doing it.

Edit: alternatively in some cars the console actually takes RGB or HDMI input and you don't even need to run directly on the console assuming ODB-II has enough info to read the input signals. I can totally see myself doing this if I had the time. Seems fun (albeit a bit dangerous for my taste)

Edit 2: It could still be a fake but it's not unreasonable to think it isn't.

more generously, you can say it was a joke :)

Notice that he has a toaster in the car too (running doom on your toaster is another common joke).

If you follow along at 0.25 speed one can tell that the screen is moving slightly in a non-linear fashion while the car is just beginning to move. Also the screen mysteriously does not experience any motion blur, though the rest of the car does.

http://imgur.com/P49KsjB https://www.youtube.com/watch?v=NRMpNA86e8Q&feature=youtu.be...

Screen is certainly superimposed. That's why the cut is there, he did not want to put in the work to overlay the headrest of the seat.

He didn't bother to do the extra work required (in After Effects) to progressively superpose the seat over the screen in a credible manner. Video edition is much more time consuming when moving objects get in front of the faked screen.

He's probably using basic Mocha for AE tracking... https://www.youtube.com/watch?v=IaH9YHY4aEo