How to set width to "100%"?

[Guts]

Hello,

Thanks for your extension.

This following code (I'm using markdown + MyST Parser) is not working:

```{eval-rst}
.. video:: ../_static/qdt_assisted_edition_vscode.webm
  :alt: Your browser does not support HTML 5 video tag.
  :nocontrols:
  :preload: metadata
  :width: 100%

[andreasciamanna]

You can achieve this by adding the following to the custom CSS file:

video {
    max-width: 100%;
}

(I prefer using max-width)

You can narrow the scope with the :class: attribute, of course.

[Guts]

Thanks you!