No, you can't change the size. It opens in a window that is not scalable. I'm not sure if they vary the view at LSL. I don't recall seeing it change.
As for the one at SS, as TommyT pointed out earlier in this thread, sometimes the SS webcam operator can remind you of a "this is your brain on drugs" commercial.
Well, in fairness to TommyT, he didn't actually say that. But, if he had, I would agree.