One of the drawbacks of Google Video, YouTube and many other online video sites is that the video can't be played full screen from a flash player. Well it looks like Adobe thought the same thing as they just introduced fullscreen playback in Flash 9.
One concern of full-screen mode is that it could be used to trick people into typing passwords into fake login screens. Those clever folks at Adobe thought of this scenario and prevent keyboard input while in full-screen mode.
The flash 9 player seems to be in beta but I expect that before the holidays all the main video playback sites will be sporting full-screen video playback.