Нужная часть в общем вот
<div id="play">
 <iframe width="500" height="426" id="Video5" class="background-video-my" 
	 src="https://www.youtube.com/embed/JHz3pPoHDl4?rel=0&showinfo=0&controls=2&start=2&autoplay=1&modestbranding=1&enablejsapi=1" frameborder="0" allowfullscreen></iframe>
	</div>
	<script src="//www.youtube.com/player_api"></script>
    <script type="text/javascript">
		function onYouTubePlayerAPIReady() {
        player = new YT.Player('Video5', {
        events: {  
			     'onReady': vidplay} 
        });
        }
			
    function vidplay() {
       var video = document.getElementById("Video5");
       var button = document.getElementById("play");
	   
       if ( $("#play").hasClass("play")) {
			  button.addEventListener("click", function() {player.playVideo();});
		      button.addEventListener("click", function() {
              button.className += " pause";
              jQuery(button).removeClass('play');});
       } else {
               button.addEventListener("click", function() {player.pauseVideo();});
               button.addEventListener("click", function() {
				   button.className += " play";
                   jQuery(button).removeClass('pause');});
       }
    }
</script>