Animated Bubble Background don’t work on mobile version ?

Hello,

I choose the animated bubble background on my start page, which is embedded as an youtube video.
It’s an option in the theme and not coded by myself.

The problem is: When I visit the page from a smartphone, the background don’t work. Doesn’t matter which kind of phone or which mobile browser version.

There comes just a black background on the mobilephone.

I want to choose a other background for the pages mobile version and I would love to keep the animated bubbles background, which is an option in the theme, on the desktop website version.

I need some advice or support by doing this, because I think that is not an regular option in the theme.

Would be glad to get some support by the developers or administrators from the Materialis theme.

Kind Regards
Daniel

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