<script>


var _Lista = [ 'jWEOi_hsa5k', 'oWenQ1Re9xQ', 'wMxlbw7blek', ];
var _Los = Math.floor ( Math.random ( ) * _Lista.length );

var html='<iframe width="250" height="250" frameborder="0" allowfullscreen src="http://www.youtube.com/embed/' + _Lista[_Los] + '"></iframe>';

document.write(html);
</script>