The second you gain control of your character at the very start of the game, run into the house at the top of the screen and into the doorway on your immediate right.
There will be a man in a red T-shirt here staring at a screen. If you get there fast enough, you should see a logo on the screen which matches the one on the poster behind it.
Just stand right next to the man, facing the screen, and watch the entire animation that plays until the screen goes black at the end. It takes about three minutes.
Unbelievably I was the first person on TA to unlock this!