I don't know if other people have a more clear video tape than I, but the one I have isn't the best of quality, however, if you look at it and contrast the skin tone of Berg to his captors, you can see that the skin tone is darker on the hands of the captors. 

Also, Arabs also have varying tones of skin color amongst them selves just like other races and I don't see the "fat" part of the conspiracy.

Another variable that influences this tape is lighting.  Near the end of the tape where they place Berg's head on what looks like his back, you can see blood, but the blood, due to lighting, is very hard to distinguish.  Changes in lighting can cause reflection that lightens skin tone and cause red to appear orange and so on.   

I've read some of the conspiracy posts out there and they keep hitting on things like the plastic chair, paint of walls and so on.  Of course those plastic chairs are every where.  And often times people are scavengers and take what they can (when I was over there in 91, when we left the Bedouins came by and scavenged whatever they could from what we did not want to take). 

I'm not trying to say I have all the answers, just that these wild conspiracy believers throw doubt on everthing, when many times there are logical explanations for things to exist.