players = new Array();

  function onYouTubeIframeAPIReady() {
      var temp = $("iframe.yt_players");
      for (var i = 0; i < temp.length; i++) {
          var t = new YT.Player($(temp[i]).attr('id'), {
              events: {
                  'onStateChange': onPlayerStateChange
              }
          });
          players.push(t);
      }

  }
  onYouTubeIframeAPIReady();

function onPlayerStateChange(event) {

      if (event.data == YT.PlayerState.PLAYING) {
          var temp = event.target.a.src;
          var tempPlayers = $("iframe.yt_players");
          for (var i = 0; i < players.length; i++) {
              if (players[i].a.src != temp) players[i].stopVideo();

          }
      }
  }