Yeah his is the best one for that content that I've seen. There's another one called LackLuster that has ok content but the host uses a lot of anti-police language, like calling them "tyrants" and other stuff that is a huge turn-off for me. I like ATA because like you said, they try to not be subjective and present things in a very neutral way.
I don't watch any specific First Amendment Auditors because I think the vast majority of them are horrible. I do watch some stuff where SovCits and First Amendment Auditors get owned by the police. That stuff is pretty satisfying.
I enjoy seeing both angles. I think the police need a lot more oversight and I think the culture need to focus on professionalism, courtesy and maintaining that in the face of hostility (not violence, just a little verbal abuse). I think bad police officers need to be more efficiently taken out of service. I think bad police departments should be identified and taken over at the state level, or failing that, if they are regularly violating rights, should be taken over temporarily by the federal government until they can police the community without doing more harm than good.