Comenzar a reproducir un video de youtube mediante Javascript

<p>BEGIN</p>
<script type="text/javascript" src="swfobject.js"></script>
<script>
  function onYouTubePlayerReady(playerId)
  { 
    ytplayer = document.getElementById("myytplayer");
  }
</script>
<div id="ytapiplayer">  You need Flash player 8+ and JavaScript enabled to view this video. </div>
<br/><a href="javascript:ytplayer.playVideo()">Play</a>
<script type="text/javascript">
  var params = { allowScriptAccess: "always" };
  var atts = { id: "myytplayer" };
  swfobject.embedSWF("http://www.youtube.com/v/cc-ClutaN_I&enablejsapi=1&playerapiid=ytplayer", "ytapiplayer", "425", "356", "8", null, null, params, atts);
</script>
<p>END</p>

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