Utterly wrong. Police are public servants. When on duty they are in the public domain.

In the UK there have been episodes of "The person fell down, and we tried to help them" became - after video footage was released - "Oh, an officer hit the person in the head as he happened to be walking past, did nothing to help and stopped passers by and an ambulance getting to the person".

Anyone who has malign intent will get the footage using a zoomed lens. My camera was not that expensive and has 16x with effective shake reduction. If you're serious about this, you'd get one with 20-30x zoom and a decent tripod.

The police don't want people providing contemporary footage of what they do as it makes their actions harder to justify. If there are uniformed officers that can't deal with the reality they are in the public eye - change jobs!