Error when playing a video in IPPSUM Bold Theme

I use Ippsum Bold Theme
I can’t play the video in the post under Firefox.
When I view it in the draft of the post, it plays, but when I view it on the page, it doesn’t work.
It works in Google Chrome and MS Edge.

Thanks for help,

Hi @rolfdirks,

Please contact the author of your purchased theme, the theme author will assist you.

How to contact an author to get support or for any technical query: