All the people in the video weren't eyewitnesses to the shooting, but there's one off camera conversation taking place with someone who was. The raw narrative that witness tells corroborates important aspects of the second person account given by a friend of the officer involved.
And at the 8 minute mark a guy says that there were 8 shots in bursts of 4 and 4.
Why is Sundance conveniently ignoring that voice.
It seems that Sundance is stuck on stupid.