The FullScreenBackground extension allows you to set a movieclip to fill the background as the size of the movie changes, while the content remains at it’s original scale.
It can also be useful to put background video on fullscreen. live example can be seen on this link:
It can also be useful to put background video on fullscreen. live example can be seen on this link:
http://www.youlookslike.com/demo/sandeep/final/
you can also use it for image on background.