Yes, this info from Vox seems essential and important:
"Filming the police takes bravery. Releasing the video takes even more."
Bystander videos have played a big part in our culture. I was thinking about Rodney King being beaten and Tasered by a circle of Cops in the 90's. Funny how all of those Cops walked. And remember that's why all those folks rioted! Just like the Cop in Long Island who choke-holded Eric Garner.
So having the video doesn't mean justice, but it can show us the truth. And the truth of it seems to be that lots of folks are being man-handled and murdered, often, maybe lots more often than we realized. And sometimes other folks pick up their cell phones and capture the event.
Yes, Cops have a very difficult job. You can sympathize with them. Up to a point. But at the same time, you realize lots of these Cops act as if they are above the law. It's the Dirty Harry mind-set. So yes, people have to figure how to take these videos and post them on-line, or get them to the media. It's really, really important.
Unfortunately you can add the Police to the list of institutions you cannot trust. It's a long list.