This demonstrates a usage of backstretch with mixed images and youtube videos.
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>
<script src="jquery.backstretch.min.js"></script>
<script>
$.backstretch([
{ url: "https://www.youtube.com/watch?v=a7nXUqGBdRQ", duration: 7000, mute: false, alignY: 0 },
"https://www.youtube.com/watch?v=Nq0Ddu2EwFQ",
"pot-holder.jpg"
], {
fade: 750,
duration: 4000,
preload: 5
});
</script>