No, the one I saw was different. They were walking around the world and shooting stone building walls. They also weren't part of a conference. The video was jus

No, the one I saw was different. They were walking around the world and shooting stone building walls. They also weren't part of a conference. The video was just their screen split with their code on one side and the game window on the other. I'm pretty positive it was Common Lisp too because I think I was looking for SLIME videos at the time. Thank you for the links.