Some incredible muzzle discipline here, assuming it's not just Divine Favor (watch it at about the 11 second mark). Excellent NCO work - perhaps. Bad NCO work - perhaps. Certainly a good exemplar of how auditory exclusion and other stress reaction can kick in. Above all though, great example of the need for maintaining mental acuity under stress.
Note: This was not posted to second guess anyone or open up a conversation about how evil space aliens were contacted by George Bush to destroy the Twin Towers. It's an attempt to talk tactics, among professionals. Keep it in that lane.
"U.S. Army soldiers from the 187th Infantry Regiment, 3rd Brigade Combat Team, 101st Airborne Division (Air Assault), alongside elements of the Afghan National Army, get caught in an ambush. Shot from the perspective of a (U.S. Army) soldier with a helmet camera in Panjwai, Afghanistan."