!-- 1. The (video player) will replace this tag. -->
// 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 (and YouTube player)
// after the API code downloads.
var player;
function onYouTubeIframeAPIReady() {
player...
