<div style="background:black; padding:5px;">
<video controls style="height:100%; border:2px black;">
  <!-- WebM format for modern browsers -->
  <source src="https://storage.googleapis.com/web-dev-assets/video-and-source-tags/chrome.webm" type="video/webm">
  
  <!-- MP4 format for other browsers -->
  <source src="https://storage.googleapis.com/web-dev-assets/video-and-source-tags/chrome.webm" type="video/mp4">
  
  <!-- Ogg format for fallback -->
  <source src="https://storage.googleapis.com/web-dev-assets/video-and-source-tags/chrome.webm" type="video/ogg">
  
  <!-- Add a text description for accessibility -->
  Your browser does not support the video tag.
</video>
</div>