I also forgot to mention interactive 3D models in STL format. [0]

There's also a user who has done amazing work [1] with SVG files, but these mainly only work if you view the original file, as MediaWiki generates a static PNG thumbnail for SVG files (silly, but maybe was needed at some point for proper support).

[0]: https://www.mediawiki.org/wiki/Help:Extension:3D

[1]: https://commons.wikimedia.org/wiki/User:Cmglee/svg