I’ll be honest. Besides the small description the user left on YouTube, I don’t know much about this video other than he claims it’s a patched demo of Guitar Hero II. Does that mean that “Trogdor” is available through a hack on the demos that went out with some magazines a few weeks back? Either way, it’s a cool video and I do believe that’s actually Strong Bad doing the vocals.
Check out a co-op version here.