Ah yes, ye-olde spoofe clip. Funnay!
Before anyone blahblah's about waste of govt resources or whatever, I have 2 points.
First, assuming this actually was in afghanistan, the little stunt was probably a great PR event for the Afghani soldiers involved and that alone was worth the 2 bullets expended. Letting the (allegedly) Afghani soldier do the shooting demonstrated trust and showed them that we have a sense of humor to go along with our expensive firepower.
Second, if it wasn't in Afghanistan, it was probably just a few people messing around on video and therefore not a waste of govt resources. If the guys had had an accident, they'd obviously get "what was coming to them".
As they apparently survived as evidenced by the poorly suppressed laughter at the end of the clip, no harm actually occurred so no harm, no foul IMHO.