YouTube is rapidly becoming the most popular place on the Internet to get your viral video fix, but recently somebody leaked a video shot at the recent GDC of some behind closed door footage of the PS3 in action. Video cameras were explicitly prohibited in this preview session, but thanks to someone who broke the rules, and the power of YouTube, there is now a grainy video of secret PS3 footage for everyone to see. The graininess and relatively poor angle make the video only a little less interesting. Shots of some interactive demos titled “Getaway,” “Heavenly Sword” and “Lair” feature insanely realistically rendered backgrounds, tons of objects on screen, and hyper-realistic damage on an innocent automobile. The last section features on apparently on rails tour through a futuristic city. While game play demos and rail-based touring are interesting, this is still quite a ways away from a production video game, so the anticipation for E3 is mounting…