Solon video does not work

Hi,
great theme, it looks very good, thank you.

I would like to use the video widget, but the video does not show up on the page. I entered the youtube link in the required field but it only displays the title on the page.

http://www.rocking-a-horsetraining.de
https://www.youtube.com/watch?v=OXO85JvbORg

What’s wrong? Could you please help me?

Thanks a lot.
Greetings