Hi,
I digged a little more into VideoMaterial , and found that:
VideoMaterial(source:String, materialSize:int = 256, loop:Boolean = true, autoPlay:Boolean = false, player:IVideoPlayer = null);
_clippingRect = new Rectangle(0, 0, _materialSize, _materialSize);
that means it’s a square area that plays the video ! and i can’t apply a SD or HD Video to a Plane… i don’t why ...