Video Background

Hi guys,

i’m using Elementor free, so I don’t know if the problem is for this version

I’m tryng put a video as full background in Home page.
In Elementor i see the video, even if i click on preview. But in the browser i only see the fallback image, even it’s a normal home pc, This problem only with Firefox, with Chrome is ok.
Can i fix it?

Now some questions

1) Is it possible get the sound of the video?
2) Is it possible switch on/off sound and stop and play video?
3) How get the full screen video in the best way? Now i’m using the “spacer”, but it’s working good only for my screen size.

Regards