What happens if you are fortunate enough to have captured some police brutality on video (more likely these days since digital cameras and even phones have the ability to shoot video)? You could call the local news station to have them air it, but they can only do so much (i.e. air it once or twice). You do much better uploading it to YouTube, where it might trigger an FBI investigation.
The combination of pervasive video and free internet distribution of video will probably do more to curtail the police brutality than all the ‘sensitivity training’ seminars. And, when it doesn’t curtail brutality then it will provide useful evidence to help secure convictions.
[Update] – What happens if you are a former TV personality and you go to a comedy club and start flinging racial epithets and the audience walks out and the last vestiges of your career disappear too?