Can't use video in <embed> tag

I need to embed video using the <embed> tag rather than the <video> tag. Other browsers support this, but Firefox doesn't.

For example, this code:

  <figure>
      <embed src="myvid.mp4">
      <figcaption>
          myvid
      </figcaption>
  </figure>

works in Chrome. Firefox however ignores the embed source and only prints the content of the <figcaption> tag.

What's going on here? Does Firefox not support video in <embed> tags?

With what content type does the server send this mp4 file ?

Did you check the Web Console?

• "3-bar" menu button or Tools -> Web Developer

Try to add a type attribute

• <embed src="myvid.mp4" type="video/mp4" >

Can you post a link to a publicly accessible page (i.e. no authentication or signing on required)?

Thanks for the interest. This page isn't being served by a webserver but is a local file. The HTML is rendered by Pandoc from Markdown. So I won't typically be able to add a 'type' key in the <embed> tag.

However, testing with

 <figure>
   <embed src="myvid.mp4" type="video/mp4">
   <figcaption>My video</figcaption>
 </figure>

show just the text "My video" in a red-lined box.

Works fine in Chrome.

Anything (possibly security) related to this in the Web Console ?

• "3-bar" menu button or Tools -> Web Developer