Modal Element - Ultimate Addon's For Visual composer: Play YouTube video automatically when modal is opened.

modal.js

<script>

function modalAutoPlayVideo(modalWrapper){ 
  "use strict"; 
  var $youtubeframe = modalWrapper.find(".ult_modal-body iframe");
  if ($youtubeframe.length){
	var videosrc = $youtubeframe.attr('videosrc');
	if (videosrc == null)
	{
		var videosrc = $youtubeframe.attr('src');
		$youtubeframe.attr('videosrc', videosrc);
	}  
	$youtubeframe.addClass("playing");
	$youtubeframe.attr("src", videosrc+'?autoplay=1');
	var $youtubeframeparent = $youtubeframe.parent();
	var $youtubeframedetached = $youtubeframe.detach();
	$youtubeframedetached.appendTo($youtubeframeparent);
  }
}

function modalStopVideo(){
  "use strict";
  var $youtubeframe = jQuery(".ult_modal-body iframe.playing");
  if ($youtubeframe.length){
	var videosrc = $youtubeframe.attr('videosrc'); 
    $youtubeframe.attr("src", videosrc);
  }
}

jQuery(document).on('onUVCModalPopupOpen', function(event, class_id) {
	event.preventDefault();
	var $modalWrapper = jQuery("." + class_id);
	modalAutoPlayVideo($modalWrapper);
});


jQuery(document).on('onUVCModalPopUpClosed', function(event,  class_id) {
	event.preventDefault();
 	modalStopVideo();
});	

 jQuery(document).ready(function(){ 
	var $modal = jQuery('.ult-modal-input-wrapper');
	if ($modal.attr('data-keypress-control') == 'keypress-control-enable'){
		jQuery(this).keydown(function( e ) {
		if (e.keyCode == 27) {
			modalStopVideo();
		} 
		});   
	}
	});	
	
	 
	jQuery(document).on("click", ".close-modal", function(e) {	
	jQuery(".ult-overlay-close-inside").click();
	jQuery(this).hasClass("anchor-modal");
		clickAnchorLink( jQuery( this ), e );
	});	 

</script>

Place js code to the site.
Then modify "scr" in the youtube embedd code to the format like this (remove additional queries)
<iframe src="https://www.youtube.com/embed/qtg0UJC-oX0" width="560" height="315" frameborder="0" allowfullscreen="allowfullscreen"></iframe>

And place it to the "Modal Content" window. In the "What's in Modal Popup? " filed, select "Youtube video"

Great!
Its working!
I just hope this script will not effect to other elements.