Apparently this syndrome is named after Walter Dandy and Arthur Earl Walker, and not because it brain-slaps you into an eternal crip walk. This little coincidence has provided me some small glimmer of hope that there is a God and that he's a pretty funny dude.
He's never known anything else, so I don't think he's terrified or anything like that. I'd say he's capable of having fun too -- in the video, he's obviously trying to play.