I can actually see where command voice (as much as I hate it too) has its place if it's applied correctly. Too often in these videos, the cops are just angrily yelling, including all kinds of F-bombs, or they're screeching because they're scared. IMO, in the instance of this particular video, the angry yelling just pissed the shootee off (know your audience), and the repeated yelling was just the cop becoming more and more ineffective by screaming the same orders and being ignored. It weakened his position.
It seems there is a big training fail in a lot of departments. At work, I used to watch the coastie boarding teams train from my office window, and they did command voice, but it was more of a "forceful command instructions" if that makes sense, than any kind of yelling.