+1
Maybe it's just awkward for them to watch themselves? I remember making a home video type of thing with my buddies for a class presentation.
During the playing of the video, we all had our heads down (I had my trusty hoodie with me that day). After we showed it to the class, I took the file and promptly deleted all traces of it. We all vowed to never speak of it again.
I don't think the video was bad or anything like that (it seemed like the class laughed most at ours, which was the intended effect). We just didn't want to see ourselves on a screen, I guess.
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Here, if you have a milkshake, and I have a milkshake, and I have a straw. There it is, that's a straw, you see? You watching?. And my straw reaches acroooooooss the room, and starts to drink your milkshake... I... drink... your... milkshake!
-Daniel, There Will Be Blood