This is probably one of the stranger dashcam videos I've ever seen.
It starts around the 3:15 mark. Turns out, the guy is a magician. If you notice his license plate, it says "Juggler" which should have been the first clue. But then, police ask what's in his pocket and he tells them he's a magician so does some magic tricks for them to prove he's sober. I'm sure it was a nice break for the police to be entertained my a magician instead of a drunk person.