title: videojs return vdata error when dispose is call
body: <p>I'm getting an error and i dont find any clues, i'm using videojs to control multiple video in a slider, on each completed transition, i call a new instance of videojs and and store the ID into a variable and dispose() the old videojs. Since i have lot of slide (or videos) and want to kill them when there are not active for performance. My slider work under TweenMax.. and i call the dispose() in the onStart event from a Timline. When the dispose() is called, i'm getting this error :</p>
  
  <p><strong>Uncaught TypeError: Cannot read property 'vdata1408997779453' of null</strong> </p>
  
  <p>This is a sample of my code :</p>
  
  <pre><code>var $slides = [],
      videos =[],
      currentSlide = 0,
      currentVideo = null;
  
  $(function(){
  
      TweenLite.to($('#header-wrap'), 1, {
              left: x,
              onStart: function(){
                  if(currentVideo) {
                      TweenMax.set($('.video-holder'), {autoAlpha: 0});
                      currentVideo.dispose();
                  }
              },
  
              onComplete: function() {
                  if(videos[slideActive].url) {
                          videojs('movie-video-holder-'+slideActive+'', {"autoplay": false, "preload": "auto", "controls": false, "lopp": false}, function(){
                              currentVideo = $vid;
                              [...]
                          });
                  }
              }
      [...]
  </code></pre>
  
  <p>Thanks!</p>