I did not created such thing ... but You can use SingleFile browser extension:

- https://addons.mozilla.org/en-US/firefox/addon/single-file/

To save entire page with images and videos as a single HTML file.

Use it this way:

- https://i.imgur.com/vFiPhFv.png

Not exactly what You needed - but still IMHO a step into right direction.

Regards,

vermaden