Surely accurate military simulations would induce discipline, just like the army does.
It seems to me anything that requires physical endurance breeds discipline, in the eyes of... someone. I don't know. But playing computer games doesn't count as physical endurance.
The youth in that video is very disciplined - he's not prepared to abandon his comrades just because he's thirsty.
But he did though. He did bugger all playing during that whole episode =]