From my military training my reaction was:
There was only one time in that video that I agreed with the assessment of "weapon" and that's the gentleman that walked into the second building. I believe he was carrying a folding stock ak47 and the way he stopped swinging it and hid it against his body seems to confirm that he was trying to hide it. Now I also understand that weapon ownership wasn't that unusual in Iraq, and I did not see the gentleman do anything threatening with it. He simply tried to hide it. Did he have it for self defense from insurgents?
Having said that, using three Hellfire missiles to attack one AK47 seems like massive overkill and the risk for colateral damage would be excessively high. I don't understand why that was approved or even asked for. Especially when you've got two Bradley fighting vehicles and a platoon of infantry nearby. Seems like ground sweep would be more appropriate and if you take fire then you call in the big guns. But you don't start with the big guns. Not when there are that many civilians in the area. Especially not immediately after having two children hit.
And the taxpayer in me wants to know who justified using three $70,000 missiles to take out a $50 gun. From a position that wasn't an immediate threat to anyone.
I also saw little in that video that required immediate action. Seems to me that with the helicopter as observation platforms, they could have monitored the group while bringing the dismounted troops in closer for a ground verification of the threat.
Conclusion: I don't see any military justification for these actions.
As a person my reaction was one of sadness. As we've discussed before, soldiers may still exist in a voluntarist society, but they need to be held to a very high standard of ethics. This video just confirms why so many can't be trusted with that power.
Apache's are crewed by two officers so we cannot say that the officers did not have the opportunity to explore philosophy & ethics. We can't say they were limited by only having a public high school education (or is indoctrination better?). So given that they had so many advantages and opportunities in education, why?
"We thought we knew everything about everything, and it turned out that there were unknown unknowns." - Richard Fisher, NASA 2009