A condition that arises when one spends a large amount of time bumming around on YouTube. This implies randomly looking for videos and wasting time rather than trying to find something or doing something useful.
Joe: Damn, what happened to Chris? I heard he got a bad case of YouTuberculosis and watched videos about trampoline accidents for three hours yesterday?
Dan: I know, he didn't want to go to the bar and watch the game because he was on YouTube!