As a former Military Policeman, I can see several alternatives to what the police in video did.

It should have been possible to grapple with the man and use ordinary hand-to-hand tactics (which are, or should be, part of every cop's training) to restraint him. After that finding someone to speak with him in his own language would have been feasible.

Looks to me like some boys had some toys and used them instead of doing some good police work.