I have viewed it again and think he might have been shaking Holt’s hand.
On the other hand, there are videos surfacing that show an INORDINATE amount of activity around Hillary’s podium by her entourage. How can that be explained?
I believe you are right. I would assume they knew each other from past associations, so it’s perfectly understandable that they would shake hands and say hello.
But that is not to say that there wasn’t something else going on, and the urgency to get control over Hillary’s papers can’t be disputed.