<html>
<body>
<button onclick="changeSource()" type="button">Change Video</button>
<br>
<video id="video1" controls="controls" autoplay="autoplay">
<source id="mp4_src" src="mov_bbb.mp4" type="video/mp4">
<source id="ogg_src" src="mov_bbb.ogg" type="video/ogg">
Your browser does not support HTML5 video.
</source></source></video>
<script>
function changeSource()
{
document.getElementById("mp4_src").src="movie.mp4";
document.getElementById("ogg_src").src="movie.ogg";
document.getElementById("video1").load();
}
</script>
<p>Video courtesy of <a href="http://www.bigbuckbunny.org/" target="_blank">Big Buck Bunny</a>.</p>
</body>
</html>