Why do the new Starcraft videos have such massive borders?

Maybe it's just me, but it frustrates me watching the new learn starcraft videos because the border is so huge. Day9 puts his webcam off to the right so that it's not in the game screen, but as a result, the screen is like .8 times the size. Why not just put the webcam in one of the blank metal textures at the bottom like most people would do. Making the screen so small for no reason just started to really bug me and now I can't ignore it. I would really like this to be changed if possible. Thank you.