Pause YouTube video
<iframe src="https://www.youtube.com/embed/XXX?enablejsapi=1" frameborder="0" allowfullscreen></iframe>
<iframe src="https://www.youtube.com/embed/fjjkcWP4heM?rel=0&controls=0&showinfo=0&start=5&enablejsapi=1" frameborder="0" allowfullscreen></iframe>
<iframe src="https://www.youtube-nocookie.com/embed/knfrxj0T5NY" frameborder="0" allow="accelerometer; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>
$('#block .el').on('click', function () {
$("iframe").each(function () {
$(this)[0].contentWindow.postMessage('{"event":"command","func":"pauseVideo","args":""}', '*')
});
});