Yes right and this is not really difficult. 
 
	The first what you need is the Steam wallpaper engine.
 
	My System is potent enough to handle 4 Monitors with animated wallpapers, you can select in the engine, wallpapers stop if you have anything in Fullscreen mode to save Ressources. 
 
	I tried with vlc Player to play a background Video a's wallpaper too and IT works. 
 
	Short discription. 
 
	Create an animated Video with After effects or any Apps. 
 
	This Video convert to h264.mp4 
 
	Create with steam wallpaper engine a New wallpaper and select the Video file. Set a's wallpaper, 
 
	Now in aida64 make the panel in Option 55 - 65% transparent. 
 
	Done 
 
	Sry for my Bad english ;P 
 
	 
 
	Edit: In steam wallpaper you can easy add gifs.