lol I'm not sure either. He did mod it to be like that, but this video is very old - so I'm sure they can work off the ideas here and have a better setup than what he has.This guy is standing so that he can turn in all directions. I guess he is using some kind of strafing on the gun controller, while his head mount replaces the mouse/camera movement.
How can you do that with wires attached on the VR or while sitting is beyond me
That being said, yea, not sure how those cables don't get tangled up on him