In my nonprofessional opinion, that is crappy aim. I can hit an apple from 100 yards away, with a black powder rifle, with an unriffled bore, with iron sights, standing up, repeatedly. I would expect a modern rifle with a riffled bore and a scope and a larger target to be much more accurate from a prone position.
The shooter had 1 target, and he delivered a 100% kill shot.
You could say "it wasn't impressive", but you can't say it was crap...