Nope , I saw a video which doesn't show everything people were saying about it and said that the guy could have done a suicide by police ,not unheard of ,he did threaten to kill police ,why not just give up if you don't have a death wish ?
On the opening post on this subject, if you actually go to the webpage in question and watch the video, you see more than in your words "Listen to the very beginning of the video ,then the white spot blocks everything else" if your monitor settings are good enough. A sane person sees what looks like an argument between the cops and this guy (and yeah the guy should know don't try really arguing with cops save it for court if it's that bad). The guy agrees to come down and starts down. The cops flashbang him without warning or provocation, and sic Rin-Tin-Tin on him. The guy pulls out one or two knives. There's a standoff while the handler pulls the dog back. The guy pivots away from the cops, and that's when they shoot him in the back.
This video is clearer to see, skip to nearly halfway through it for the footage.