gistfile1.txt

$allVideos.each(function(){
  var $this = $(this);
  
  if (this.tagName == 'embed' && $this.parent('object').length) { return; }
  
  var height = this.tagName == 'OBJECT' ? $this.attr('height') : $this.height(),
      aspectRatio = height / $this.width();
  $this.wrap('<div class="fluid-width-video-wrapper" />').parent('.fluid-width-video-wrapper').css('padding-top', (aspectRatio * 100)+"%");
  $this.removeAttr('height').removeAttr('width');
});