SO: Autoplay embedded Youtube video with Fancybox
http://stackoverflow.com/questions/5159047
by Marcel
HTML
<script src="http://fancybox.net/js/fancybox-1.3.4/jquery.fancybox-1.3.4.js"></script>
<link rel="stylesheet" href="http://fancybox.net/js/fancybox-1.3.4/jquery.fancybox-1.3.4.css">
<h1>Playing YouTube links in FancyBox</h1>
<p>YouTube: <a class="yt" href="http://www.youtube.com/watch?v=Sw0ihnuvIKI&autoplay=1">Falling key in slow motion</a></p>
CSS
body { color:#222; font:.8125em/1.4 'segoe ui', sans-serif; }
h1 { margin:0 0 .6em; letter-spacing:-.05em; font:700 3em/1.15 'myriad pro', sans-serif; }
a { color:#36c; }
JavaScript
$(".yt").click(function(e) {
$.fancybox({
'padding' : 0,
'type' : 'swf',
'href' : this.href.replace(new RegExp("watch\\?v=", "i"), 'v/'),
'swf' : { 'wmode' : 'transparent', 'allowfullscreen' : 'true' }
});
e.preventDefault();
});