Taking videos full screen on SAP Successfactors LMS

I have an issue with the "full-screen" button at the bottom of videos using the Modern Storyline player.  I have several courses we developed for a client who utilizes SAP SuccessFactors LMS (they have a modified version due to being a government agency and need added security measures, and/or may not be completely up-to-date with the latest SAP releases).

When I open the published story.html file locally, the videos plays and enlarges to full screen. 

When I publish the course to the SCORM Cloud, the course launches and the video plays and enlarges to full screen. I should note that I see it uses an iFrame to display the Storyline content and has arguments to allow fullscreen:
<iframe allowfullscreen mozallowfullscreen webkitallowfullscreen allow="autoplay"></iframe>

However, when I send the client the exact same files to post on SuccessFactors, the video plays, but the button does nothing and in the developer console I see violations "Permissions policy violation: fullscreen is not allowed in this document." 

I think this is due to the frameset code to display the content. I can duplicate this issue on my local server with a simple frameset page and the fullscreen button doesn't work there too - which eliminates any possible policy setting on SuccessFactors' end, but there must be something different that SCORM Cloud has figured out how to overcome this.  

There's a similar thread here in the Rise section, but no answers were given there either: https://community.articulate.com/discussions/rise-360/embedded-videos-in-rise-360-not-playing-full-screen-in-lms