I have made changes to TunerFreeMCE to automatically go full screen in Hulu, BBC, and for the BBC streams it will also now auto play and auto full screen. Download version 2.2.7 now to get all of these great features.
It does that by simulating a mouse click in the right place. It only works when running full screen, and there is a slight possibility that on some screen resolutions it missed. If that happens to you, send me a full screen screenshot, and I'll use that to improve the reliability.