If the video portion is of concern you can simply do enough to get what you need on video and anonymously seed the video on youtube or to the media. It's not hard these days as many of us carry digital video recorders on us. Send a copy of the video to their superiors and ask them if it'll pass the headline test...

It really amazes me though how careless / reckless some of these people can be these days. Especially with how common video cameras are now days. Granted too often do the videos only show a small part of the entire incident so that it is taken out of context. But hey, that's a whole separate issue.