It seems that you're using an outdated browser. Some things may not work as they should (or don't work at all).
We suggest you upgrade newer and better browser like: Chrome, Firefox, Internet Explorer or Opera

×
How do i change the size of the AVI movies to full screen?
It's the Videosize option in the options menu. But this option is greyed out - for whatever reason. So no, I'm afraid you cannot change video sizes.