SQS 7.1 - Remove Native Video Block Paddings

Hello

The video I've uploaded has padding around it. I want it to fill the DIV/Block instead. I've also tried multiple Custom CSS codes that I have found, like the one below, but they all don't work.

div.video-block {
    padding: 0 !important;
}

Here's the demo page: https://www.marioneugster.com/video

How can I make the video fill the block without any padding?

Thanks