gistfile1.txt

<div class='row'>
  <div class='col-md-4'>
    <div class='thumbnail'>
      <div class='embed-responsive embed-responsive-16by9'>
        <iframe class='embed-responsive-item'
          src='YOUTUBE EMBED URL GOES HERE'
          width='560'
          height='315'
          allowfullscreen>
        </iframe>
      </div>
    </div>
  </div>
</div>