title: How can I display an image if browser does not support HTML5's <video> tag
body: <p>Does anyone know how can I display an image for the browsers which don't support the  tag ? Displaying a text such as in:</p>
  
  <pre><code>&lt;video src="video.mp4" type="video/mp4"&gt;
      Your browser does not support the &lt;video&gt; tag
  &lt;/video&gt;
  </code></pre>
  
  <p>Is easy, but if I replace the text with an img tag, it will always show the image, even when the browser DOES support the video tag.</p>
  
  <p>Thanks for sharing your knowledge</p>
  
  <p>(EDIT) This is not the case, my tests were wrong and img tag indeed gets rendered only when video is not supported (e.g. Safari 5)</p>