Mmm... having seen the video, I'm more convinced. It's not absolutely conclusive, but there doesn't seen to be anything inauthentic about it that I can tell. I'm not sure if it would be appropriate to link it here; it's easy enough to find on YouTube.

What Gaddafi's death (in an illustrative way) and the fact of the massacres by rebel forces of Gaddafi loyalists (more practically) indicates, to me, is that we shouldn't have gotten involved. Mass grave were going to be filled no matter what. I don't see these as one-off incidents, I see them as the start of a new pattern that has a strong chance of being either indistinguishable from or distinguishably worse than the previous pattern.