function openVideo() {
	
	if ($('#popup').size()) {
		$('#popup').fadeOut(function () { $(this).remove(); });
		$('#popup-back').fadeOut(function () { $(this).remove(); });
		return false;
	}
	
	$('body').append('<div id="popup"></div><div id="popup-back"></div>');
	$('#popup, #popup-back').hide();
	
	$('#popup').css({'top': $(window).scrollTop() + $(window).height()*0.2, background: 'none' });
	$('#popup').html('<iframe style="width: 491px; height: 276px; margin: -15px;" src="//www.youtube.com/embed/Z94yVVTn0oc?autoplay=1&iv_load_policy=3&rel=0&showinfo=0" frameborder="0" allowfullscreen></iframe>');
	$('#popup-back').fadeIn();
	$('#popup').fadeIn();
	
	$('#popup-back').click(function () { openVideo(); });

}