on the video you can hear the wpc asking him to stop resisting.
I suspect they sent 6 officers as he's a big lad and they probably expected trouble. If he'd just said 'fair cop', turned around and let them put the bracelets on there would have been no bother. Down the station, quick interview, caution and off you go home. He just made it hard on himself for no reason.
Former university lecturer so that was probably his first encounter with the real world.

