var video_default = '4jrWY7Mo_Y0'; // 2. This code loads the IFrame Player API code asynchronously. var tag = document.createElement('script'); tag.src = "https://www.youtube.com/iframe_api"; var firstScriptTag = document.getElementsByTagName('script')[0]; firstScriptTag.parentNode.insertBefore(tag, firstScriptTag); // 3. This function creates an