I can agree that videos should be published, providing they show the WHOLE truth. So often a video can be shown "out of context" as we saw in the Rodney King case. A review of what transpired BEFORE the published video, shows that Rodney King likely brought the problems upon himself.
That should go for police videos also, everything leading up to an altercation should be shown. Fox News' Judge Napolitano speaks of some 300 odd police videos in Washington state which "conveniently" disappeared. Videos are good witnesses, but they can be manipulated..