Wearing a badge given to you by citizens doesn’t mean you can mistreat the people who gave you the power. Following the law and policing the world doesn’t mean you can abuse your authority.
The way these cops act is a violation of the human trust, not only that but they’re setting a bad example for all law enforcement. Protect and serve, I don’t see protecting or service being offered in this video.
Cops don’t like being recorded because it means they’ll be held accountable. It is not against the law to record in the public domain and cops do not have the right to take your belongings without putting you under arrest.
This article offers some good advice and perspective.