<section>
  <video class="background-video" autoplay poster="https://webslides.tv/static/images/working.jpg">
    <source src="https://webslides.tv/static/videos/working.mp4" type="video/mp4">
  </video>
  <div class="wrap">
    <p><code>.background-video</code></p>
    <h2><strong>WebSlides is the easiest way to make HTML presentations. Inspire and engage.</strong></h2>
  </div>
</section>