Nick Berg Video Edited?

One of the explanations I've seen on the 'Net for the absence of massive amounts of blood in the execution video of Nick Berg is that the video was heavily edited.

But that, in itself, raises another question. Why?

If the point from the executioners was to show us the horror, why would they edit out some of that horror? Sure, stupid people do stupid things, but that in itself is not enough to explain this.

So now the questions aren't limited to who really killed the young man (and why he was targeted), how come he's in a US-issue style orange prisoner jumpsuit (so long after his supposed release from Americans holding him), and who the real executioners are, but who edited the video. And why.