In my experience, video taken by citizens when presented as evidence of officer misconduct has always been edited to show only the police response to action taken by the offender(s). I have yet to see an offender's video of what precipitated the response to the offender's actions. When the citizens record police it is a 1st amendment right, but when the police record citizen's actions, police are violating their 4th amendment rights, really?. Cameras are to criminals as lights are to roaches, when they turn on, they both scatter.
I myself prefer video/audio, it justifies police response. If there's a COMPLETE video, I'll place my bets with the police.
Btw, Rodney King was a great example of such editing. That POS did get his justice, he OD'ed and died drowning in his own pool penny-less.
http://www.cnn.com/2012/08/23/us/rodney-king-autopsy/.
Thanks for the reference.