missing MIME types

The uploaded videos are missing basic MIME type tags

Documentation
https://www.w3schools.com/tags/tag_video.asp
https://developer.mozilla.org/en-US/docs/Web/HTML/Element/video
https://html.spec.whatwg.org/multipage/embedded-content.html#the-source-...

Uploaded video with Video module:

<video>
      <source src="video.webm">
  </video>

Should be:

<video>
      <source src="video.webm" type="video/webm">
  </video>

When multiple files

<video>
      <source src="video.webm" type="video/webm">
      <source src="video.mp4" type="video/mp4">
      <source src="video.ogg" type="video/ogg">
  </video>