Video navigations not visible

Hello,

We are using H5P Version 1.15.3 on https://riteadvantage.com/ site.

We have issues with iframes, the navigation (nex, prev, stop, play, etc.) buttons are not visible. Please see that atthaced file.

In order to see the elements I need to use CSS to push it up, see the attahced file.

Here is an example link:

https://riteadvantage.com/topic/tissue-behavior-in-mri-camrt/

and this:

https://riteadvantage.com/lessons/time-varying-rf/

Please advise and let me know if you need additional information.

Thank you!

P.S. CC [email protected]