Embedded Videos get stuck

Hi,

I have multiple complaints from customers about videos getting stuck.
I embed my videos from VIMEO.
If I watch the video directly in Vimeo – it works fine, but if I watch it through the course page (where it’s embedded) it gets stuck as if the internet connection is bad (which is not the case).
Also, it can not be that all these customers that complain have a bad internet connection.
After checking, trying, and investigating, it really looks like the problem starts after embedding the video in my LearnPress course page.

I would really like to resolve this issue.

Thank you, and have a great day! ??

Anna