most rude people ever from my experience. off the boat chinese will storm a free food event like crocs at a wildebeast crossing. i see it wll the time. my company puts on events and seminars and invites well eductaed (but off the boat) chinese to come.mthey will load up massive plates with no two fucks given. i think its cultural "survival of the fittest" mentality, or they really just dont care about aanyone else and operate in their own world, but that wouldnt make sense because many seem shy and hyper sensitive to how they appear to others. their entire culture is built around judging people who have more or less (money, fame, etc.)
edit; apparently they are japanese in the video. if so, then its just shit head people being shit head people. japanese do not have rudeness in their culture. but as always, people will be people