title: YouTube iframe API and WordPress
body: <p>I'm trying the following code on WordPress post page:</p>
  
  <pre><code>&lt;div id="player"&gt;&lt;/div&gt;
  
  &lt;script&gt;
      // 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 &lt;iframe&gt; (and YouTube player)
      //    after the API code downloads.
      var player;
      function onYouTubeIframeAPIReady() {
          player = new YT.Player('player', {
              height: '390',
              width: '640',
              videoId: 'M7lc1UVf-VE',
              playerVars: { 'autoplay': 1, 'controls': 0 },
              events: {
                  'onReady': onPlayerReady,
                  'onStateChange': onPlayerStateChange
              }
          });
      }
  
      // 4. The API will call this function when the video player is ready.
      function onPlayerReady(event) {
          event.target.playVideo();
      }
  
      // 5. The API calls this function when the player's state changes.
      //    The function indicates that when playing a video (state=1),
      //    the player should play for six seconds and then stop.
      var done = false;
      function onPlayerStateChange(event) {
          if (event.data == YT.PlayerState.PLAYING &amp;&amp; !done) {
              setTimeout(stopVideo, 6000);
              done = true;
          }
      }
      function playVideo() {
          player.playVideo();
      }
      function pauseVideo() {
          player.pauseVideo();
      }
      function stopVideo() {
          player.stopVideo();
      }
      function loadVideoById(val) {
          player.loadVideoById(val, 0, "large");
      }
  &lt;/script&gt;
  </code></pre>
  
  <p>However, nothing was displayed.</p>