Reg. playing video on vid1 and vid2 windows

Hi all,

I can play a video file on GFX window using mplayer, and by
mentioning /dev/fb0 to mplayer, video file gets played only when i
use /dev/fb0, and video is not getting played if i give /dev/fb1 to
mplayer.

How can i play video files using /dev/fb1 and /dev/fb2?

Thanks,
Srilatha.