You know those images that people have for there user pictures/avatars that are GIFs. I want to make one into my background for my computer. My operating system is Mac OS X. When I left clicked on the image and clicked on the set as background image a window came up with a preview. The image was moving how it normally is. When hit set as background image my background was one frame from the video. Please could you tell me if I can set the image/video as my background 