fix

assets/jquery-lazy/plugins/jquery.lazy.do.js

@@ -0,0 +1,26 @@
+/*!
+ * jQuery & Zepto Lazy - YouTube Plugin - v1.5
+ * http://jquery.eisbehr.de/lazy/
+ *
+ * Copyright 2012 - 2018, Daniel 'Eisbehr' Kern
+ *
+ * Dual licensed under the MIT and GPL-2.0 licenses:
+ * http://www.opensource.org/licenses/mit-license.php
+ * http://www.gnu.org/licenses/gpl-2.0.html
+ */
+;(function($) {
+    // load youtube video iframe, like:
+    // <iframe data-loader="do" data-callback="__callback" ></iframe>
+    $.lazy(['do'], function(element, response) {
+        var callback = element.attr('data-callback');
+        if (typeof window[callback] === 'function') {
+            window[callback](element, response);
+            // remove attribute
+            if (this.config('removeAttribute')) {
+                element.removeAttr('data-callback');
+            }
+        } else {
+            response(false);
+        }
+    });
+})(window.jQuery || window.Zepto);