Most of the behaviors shown are pretty consistent across cultural lines.I think this video is dead on and useful (although I bet some of it would vary in different cultural settings). But I'm honestly surprised that it would be that necessary. I've always been one to walk away and avoid fights as much as possible, but this kind of behavior is kind of 'no ****' to me. I just can't imagine how most people (or at least most adult men) wouldn't know the meaning of these indicators.
I'm not exactly in agreement that looking down or at the fist is a particular reliable precursor/signal... and that one might change with different cultures (some cultures don't make as much eye contact as is common in the US). Most of the others, though, are really part and parcel with the autonomic arousal system.