Description from the tip that came over VMC's email:
"This is a video shot in front of Social Club, a popular night spot in Victoria, between Pandora and Johnson streets. I didn't film it, but I'm afraid as soon as VPD hears about this video, it will be removed from Youtube and might fly under the media radar. I spoke to the person who recorded this, and got a bit of info. In the first few seconds you see two groups. The group in the back is one officer attending to someone who has been 'knocked-out' by a man being arrested in the front of the frame by 2 more officers. The fourth officer, in yellow, arrived at the same time as the person recording."
More coverage from B-Channel News - http://bchannelnews.tv/?p=4282