Hey there,
Thank you for reaching out to us. I checked your site in Chrome and Firefox and the background video is working fine on my end in both browsers. This could be the OS specific or browser specific issue, I tested on Windows 10 system and it’s working fine on my end. Can you please tell us the OS and browser version you’re testing in so we can try replicating the issue?
Another thing, are you using a touch screen system? If yes then It’s a known behavior with hybrid devices (mixed of both desktop and mobile touch features). Most modern mobile and tablet devices now surpassed desktop screen resolution. Hence, it’s harder to detect if a device is a desktop or mobile since hybrid device specs are almost equal to a tablet.
The only thing that separates them now is touch feature, now they introduced it on laptop/desktop too. The background videos are disabled for mobile devices / touch devices, that might be the reason you’re not seeing the background video on your end. Try disabling the touch feature of your system and test your site again and it should work as expected.
Let us know how this goes!