fancybox v2.x DEMO

By JFK http://stackoverflow.com/users/1055987/jfk

HTML

<link rel="stylesheet" href="//cdnjs.cloudflare.com/ajax/libs/fancybox/2.1.5/jquery.fancybox.min.css">
<script src="//cdnjs.cloudflare.com/ajax/libs/fancybox/2.1.5/jquery.fancybox.min.js"></script>
<a class="various fancybox" href="https://www.youtube.com/embed/jid2A7ldc_8?autoplay=1">Youtube (iframe)</a>

JavaScript

$(document).ready(function () {
    $(".various").fancybox({
        type: "iframe", //<--added
        maxWidth: 800,
        maxHeight: 600,
        fitToView: false,
        width: '70%',
        height: '70%',
        autoSize: false,
        closeClick: false,
        openEffect: 'none',
        closeEffect: 'none'
    });
})