the simplest way seems to be to use an iframe, same as youtube does:
Code:
<body>
<iframe id="myvideo" width="533" height="300" src="" frameborder="0"></iframe>
<script>
function videoplaying() {
document.getElementById("myvideo").src="http://embed.break.com/MjM4NTM2Ng==";
return false;
}
</script>
<a href="#" onclick="videoplaying();">Video</a>
</body>