Make video blocks fill container

Hi, 

How do i make video fill container, like how you can do with images? 

My problem is to get full width on desktop i have to strech and overlay container over other images to get it to full width, and on mobile it shows in it's original very narrow width instead of filling out the container. 

Is it possible to do something with custom css?

Best

Simon

Can you share link to page where you use video?

Sure it's on the home page: https://strawberry-plum-ym78.squarespace.com/

Try this code to Website > Website Tools > Custom CSS

.fe-65c9056e45660d2da9efc60d video {
    object-fit: cover !important;
}

Thanks, it does work. But not in edit mode, so i can't adjust the container and make it the size i want, like how it works with images. 

Is this not possible?