Oops, it's just a mistake on word choice in the nutshell summary. This works on static files like on a local filesystem (in that case the "server" is the local filesystem that serves me files that happen to be html)

Edit: on second thought, direct filesystem access has different origins which would mess with iframes. I'm not on the computer now to test. But at the very least you need a basic web server that serves files.

Thanks for the clarification, so it would work the same as a static site where you just need a place to retrieve the files from

Yes, aka a webserver