The video is absolutely horrifying. Although, I will admit that after the decision is made to use deadly force it doesn't really matter to many how many bullets go flying, dead is dead. Obviously I'm ignoring the chance he could possibly survive a few hits, but I think it's somewhat reasonable to be reductive here.
The bigger question, to me, is was the use of deadly force justified. Reporting is that the victim fired at police from his car and this is apparently on video, a firearm and casing were also found in the car. So it may have been reasonable to assume he was armed and had intention to use a weapon against police ("again").
So this looks horrible, and while I think 60 bullet sounds is absolutely insane... I'm not sure how much the number... matters? Other than emotionally.
Of course I wish this young man was not killed. Some of the reporting makes me wonder if this was some weird suicide by cop. New gun, not known to be a gun guy, one round only, fired at police, gf just died the week prior, gold ring found with the gun in the car.
Tragedy.