Background video is not displaying in mobile

How to enable background video in mobile?
Background video is working well in desktop but the background image replaces the video in mobile.
Using Bricks 1.6.2 and a built-in theme.


The mp4 caused the problem. It’s working well with webm format.

I tried WEBM myself instead of MP4, but couldn’t get that to work either for me on mobile in Chrome.