The difference in that video and what happened with Michael Brown, Trayvon Martin, Jacob Blake and whoever this guy was in Lancaster was this: malice on the part of the deceased.
All of these individuals threatened someone else with a reasonable threat of death or serious bodily harm. All of the people who killed them were in that state of mind.
That person in that video, the guy that got killed by the two guys in Georgia and the guy in Brooklyn that got killed in the choke hold (although the cops were acquitted) were all unjustified killings. In my opinion of course.
But let's not lump then all together, it's not even apples and oranges, it's apples and cinder blocks.