It is not perfect solution but it works,
<iframe class="delayed" width="486" height="273" frameborder="0" data-src="__url__" allowfullscreen=""></iframe>
note that I used data-src instead of 'src'
$(document).ready(function() {
setTimeout(function() {
$('iframe.delayed').attr('src',
$('iframe.delayed').attr('data-src'));
}, 20000);
}
It will load iframe 20 seconds after page loads.
see my fork: http://jsfiddle.net/WswGV/
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