Backstretch a simple jQuery plugin that allows you to add a dynamically resized background image to any page.
Vide is a fullscreen background jQuery plugins supports for videos.
Big Video is a fullscreen background jQuery plugins supports for both videos and images. This plugin makes it easy to add fit-to-fill background video to websites. It can play silent ambient background video (or series of videos). Or use it as a player to show video playlist. BigVideo.js can also show big background images, which is nice to have for showing big background images for devices that don’t have autoplay for ambient video.
SimpleVid is a fullscreen background jQuery plugins for fluid videos