As always it is important to know the law. As the video shows, cops aren't always on top of what the actual law is. Too many people assume they know and it gets them in trouble. That said, it is almost always 100% legal to photograph or videotape in public.
In my opinion all cops should have cameras in their car or mounted to their uniform or something like that. I can see why they wouldn't want that, because often times perfectly legal and reasonable tactics can look much worse. But I also live in this town so pretty much anything I do is videotaped and if nobody is going to consider why I might not want taped all the time, I'm not going to consider why cops might not want taped all the time. And if your job is to have deadly force available at all times, then maybe the job should be taken with utmost seriousness. I'm not even saying these videos should be made public, just available to supervisors and courtrooms when needed.
To be fair though this video makes cops look very bad when really they just pinpoint a handful of unfortunate instances. A cop's job is made easier when the relationship between cops and community is brought together, not wedged apart. When you know the citizens are expecting the worst from you, or just do not like you, you have to expect them to act and react according to that attitude.
Yeah, cops should have cameras on the cars. I agree. Those things have gotten a lot of actual justice when it comes to people killing cops on traffic stops and such. then they have some kind of evidence.
As far as people getting in trouble for recording cops, they sure aren't making the relationship with the community come together.
Also, and I the only one noticing that they keep giving the cops more and more power, and they keep getting more and more dickish? Drunk with power. No thanks