Question: I have the latest FF and I am trying to embed a video using the video tag. I saved the file on my desktop with test.html and my video is also at the desktop 
This is the code I'm using

```
<!DOCTYPE html>
<html>
<body>
<video controls>

  <source src="Wildlife.wmv">
  Your browser doesn't support video, you may download the

</video>
</body>
</html>

```

I get an error `No video with supported format and MIME type found.`

Any idea what might be the issue?

Answer: 
Browsers don't use wmv as the codec isn't widely avaliable - use mp4, ogg or webm depending on the browser. 

<http://camendesign.com/code/video_for_everybody> is a brilliant resource for learning about the intricacies here.
Try this if you are running your application on various user agents.

```
<!DOCTYPE html>
    <html>
    <body>
    <video controls>

      <source src="Wildlife.mp4" type="video/mp4">
      <source src="Wildlife.ogg" type="video/ogg">
    <source src="Wildlife.webm" type="video/webm">
    Your browser doesn't support video, you may download the

    </video>
    </body>
    </html>

```