Creating Video Box

I am looking to create something similar to the iphone video display on this site:https://www.mutesix.com/

I know I can do this on wix but I figured webflow should have the ability to put a custom video field that is not hosted online.

I’ve tried and failed because every time I try to use a transparent background video, it shows up as black and the image is not contained within the background video element box.

Any help? Possibly HTML?


Here is my site Read-Only: LINK
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