Filming Cops For Scared People
If you are in a public space and "a safe distance away" and "not getting in the way" you are following all of the laws when filming openly.
Shockingly even if you are clearly doing all of these things a police officer may react as if you aren't. Be ready for that reaction.
The more people do this the more video there will be so the truth gets out to the public. But, even if the video isn't important it sends a message about your community and expectations.