Responsive Background Video for perfect fit also on mobile devices

Hello all!
I am new to Bricks builder so please be gentle :slight_smile: and thanks in advance!

Here is what i wish to acomplish:
A hero section full vertival height and full width with a short background video autoplayed when somebody enters the page. This will be a landing page.

I have tried to make the video background and it works fine, but i am not sure how to style it fo be responsive on every devices.

Any ideas would be greatly appreciated!