Great site:

http://wrestlingref.com/id24.html

Now this is a college match so college rules apply. The official in the video clip awards a takedown and it is in fact a takedown. College Rule 2-6 states that a supporting point or a part of a foot of either wrestler has to be in bounds in order to score a takedown.

As you can see the hand of the would be defensive wrestler is a supporting point and even though the bodies of both wrestlers are outside the wrestling area, the hand is in. Therefore it is a takedown and the right call is made.

Here is a called pin that occurred at the moment this still was captured. Now its impossible to see what the official was looking at from the other side of this video. But from what I can see in this video and the fact that a pin was called at the moment of this still. I can't imagine how a pin was called. Now we should all know the pinning area extends down to the bottom of the scapula. But in this picture it REALLY looks like there is no way even his scapula could be touching the mat. Its looks like they are laying on top of the offensive wrestler. Could go one way or the other.