High quality video as hero section bg

I’ve been amazed by the power Webflow has given me. But I can’t find an elegant solution to changing the hero section background to a video. I’m hosting an webm video on amazon S3, since I’ve read that’s the best way to go about this, but I can’t get it to work. Who is able to point me in the right direction please?

Here is my site Read-Only: [LINK]