You can be massively misleading even if you're filming reality as it happens. The first of the recent Atlanta shooting videos to air left out the part where you see the suspect point a taser at the police. Ie the video appears he was shot in the back, but security cam footage shows the full story.
Wow, first time I've seen this video. I don't want that man as a cop in my USA. Absolutely disgusting. This is more aggressive than we treat enemy combatants in Afghanistan. Deadly force as a response to a fleeing individual shooting a non-lethal, short ranged weapon over his shoulder? Disturbing.
Have you seen the video? The cop drops his own taser and draws his firearm as the victim runs away. Why would he do that? Because he knows his taser is out of range, won't reach the victim.
So he knows his taser has the stopping power of a nerf gun at that point. The corollary is that he knows the taser in the hands of the victim is also out of range, also has the stopping power of a nerf gun. After this is known, because it is known, he drops his taser and draws his pistol, which does have the range.
