Embedding a Keynote into Wordpress not working.

I have the latest version of WP

I have the latest version of Keynote

I can open the presentation in an anonymous browser or unlogged in a regular browser without a problem

I can embed a YouTube on the same site using the same process (paste and return)

It feels like the problem is iCloud related or Keynote related

I tried this on three different WP sites each one running on different hardware

Any ideas anyone?