@amist,
Nah, there isn't more than enough information. It's possible that they were scared and mowed down civilians needlessly, it's possible that they simply didn't care. And it's possible that there was fighting in the general area, and that this is what groups of insurgents often look like.
My issue with the edited video is that it tells you the story before you see the video, and then labels the reporters and zooms in on the children (who still looked like blobs). Without that, I think watching it you would never guess that reporters and children got shot. In other words, the video is aimed at political impact, not at just leaking the video.
I think one of the toughest dilemmas is how to handle what could be a terrible crime when there isn't enough to go on. If you err on the side of innocent till proven guilty, you wave your hands at murder. If you go ahead and blame, you might be making a terrible accusation that isn't deserved.
I haven't read deeply into the case, so it's quite possible that there's extra information out there that shows they acted completely in the wrong.