<div class="container">
  <div class='embed-container'>
    <iframe src='https://www.youtube.com/embed/TILD7wQFjGs' frameborder='0' allowfullscreen></iframe>
  </div>
</div>

.embed-container { position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden; max-width: 100%; } .embed-container iframe, .embed-container object, .embed-container embed { position: absolute; top: 0; left: 0; width: 100%; height: 100%; }