It's a movie of somebody playing Doom, not actually Doom running on it.
> Yesterday I had a lot of retweets and reddit posts and such for playing Doom on a pregnancy test.
> But as I explained then, it wasn't really PLAYING on a pregnancy test, it was just a video being played back, not an interactive game.
> Well, now it is. It's Pregnancy Test Doom!
So it's for all intents and purposes still playing back a video, it's just a live recording instead.