title: Use GIFs in <video> tag, or use videos in <img> tags
body: <p>I've been trying to get a way of showing both <code>gif</code>s and <code>video</code>s (<code>.mp4</code>, <code>.ogg</code>, <code>.webm</code>) <strong>within the same tag</strong>.</p>
  
  <p>So, if it is within a <code>&lt;video&gt;</code>tag I would only  change the source or the <code>&lt;source&gt;</code> to a <code>gif</code> or <code>video</code> and show it accordingly.</p>
  
  <p>Unfortunately I'm not finding anything consensual that would allow doing this.</p>
  
  <p>Does anyone got a simple solution before I move on to the hardest ones?</p>