If you want to play video as ur desktop background
Required=VLC Media Player,DirectX9 Or Higher.......
STEP 1=open VLC Media Player.
STEP 2=Simply play any movie or clip in it
STEP 3= while playing any movie in VLC player---> press right click in ther player and select option video---->then there will be a option direct X wallpaper click on it
now minimize the player and enjoy video in desktop background