NEW:
5) an embedded version of the locally-hosted genially (the quiz), with a locally-hosted genially inside of it (the José video):

this is a link to the file manager test version

— not hosted at genially, but “inside” of WordPress through the File Manager plugin

3) can I make a link do a pop-up?  maybe this?

4) or can I make an iframe or embedded version of the locally-hosted one? like this:

2) and here is the direct-embedded from genially itself — still hosted at genially :