Here's a text book arrest, funny that hey when the cameras are there.
Note the control of both hands by two policemen. Also note the knee to the groin when the kid goes down (a favourite of the police is to give you a few digs to the nuts because they know it hurts) Notice the kneeling on the suspect taking, more or less, full control of him on his own.
Also take note of the policeman checking out where the camera was, i would suspect to see whether he could give some one a crack...but i am a cynic
YouTube - Drunk British Teenager resists Arrest