When a cop asks "Are you going to cooperate?", I find it best to not argue, wherever you are in the world.
I once got accused of dropping a bag of chips on the floor by a copper driving by. I hadn't but when threatened with arrest I picked up the litter because it was the smart thing to do. Same as when I was accused of speeding when doing 25 in a 30 zone, despite the copper not having a speed gun. As soon as I queried that I was threatened with obstructing their duties so just agreed to drive slower.
This guy is upset he's been accused of something and wants to make it a bigger issue when he should be smarter.