Background videos not working mobile, all formats provided

Hello there,

we’ve decided to use background videos in some sections of our website.
I am testing it on my iPhone SE (2020) in Safari, but the videos don’t seem to load. The fallback image seems to work, but not a single video, in spite of WEBM, OGV, and MP4 being provided. It works fine on desktops.

Is there a way to fix this?

Thank you in advance and kind regards 😄

Ticket