Force preload of video in HTML5

gistfile1.js

function addSourceToVideo(element, src, type) {
    var source = document.createElement('source');
 
    source.src = src;
    source.type = type;
 
    element.appendChild(source);
}
 
var video;
var index = 0;
$(document).ready(function(){
    video = document.getElementsByTagName('video')[0];
    addSourceToVideo( video, "http://video-js.zencoder.com/oceans-clip.ogv", "video/ogv");
    addSourceToVideo( video, "http://video-js.zencoder.com/oceans-clip.mp4", "video/mp4");
 
	video.addEventListener("progress", progressHandler,false);
 
	bindKeys();
});
 
progressHandler = function(e) {
	if( video.duration ) {
		var percent = (video.buffered.end(0)/video.duration) * 100;
		console.log( percent );
		if( percent >= 100 ) {
			console.log("loaded!");
		}
		video.currentTime++;
	}
}