You can hear the rage in this cop’s voice as he behaves completely illegally and unprofessionally. You can skip towards about the 2:20 mark to see what takes place.
This guy has every right to video record and speak freely in a public place. In fact, it is a loving thing for him to do to sacrifice his time to help keep everyone accountable. If the cops didn’t have anything to hide, they’d be happy that there was someone recording. If they had half a brain, they’d realize it’s their job to protect the camera man’s first amendment right.