u must follow these rules to play video on dekstop .. just click on more to know it
Just follow the steps given below:
1.Download VLC Media Player and install it.
2.Run VLC media player,go to Settings->preferences->Interface->Main interfaces,then click on wxWidgets.Remove the tick on "Taskbar" and put a tick on "Systray icon".
3.Now go to Video->Output Modules->DirectX.On the bottom right put a tick on advanced options check box.You will now see some options.Put a tick on "Enable Wallpaper Mode ".
4.Now,select playlist and put a check or tick on "Repeat current item ".
5.Press the Save button.Now close the Vlc player and run it again(to save the settings permanently).
6.Now play any video you would like to set as Wallpaper.Right click on the video and click on "Wallpaper".The video would be set as your wallpaper!!!!
Since you have checked the option "repeat current item ",the selected video will play on continuously.It will start again when finished.VLC player will remain in your system tray.If you wish to remove the wallpaper simply close the player and you will get back your original wallpaper.
If you have any query please feel free to drop a comment.
this is the link :