Probably. I'm always doing something wrong. My wife informs me of this constantly.
Midnight Blue Productions M.M.Inst.V.
Actually I was going to ask why when I click on the "full screen" box on VIMEO videos here they don't change to full screen, but then I realized that the YouTube videos didn't either, so it must be something about how the embedding works. (Yes, I know I can click on the videos to go to the original website and view them in full screen there).
Much ado over nothing. Story of my life.