embedded videos don’t play in Safari

On this page (in the 3rd and 4th accordion element) I have embedded videos from my media library. They play fine in Chrome but not in Safari. What’s wrong?
Here’s the embed code:

[evp_embed_video url="https://heilpraktikerinnen-kaarst.de/wp-content/uploads/2020/06/Vitamin-D-IG.mp4"]

When I open just the video link in Safari (https://heilpraktikerinnen-kaarst.de/wp-content/uploads/2020/06/Vitamin-D-IG.mp4) it works.

The page I need help with: [log in to see the link]