Its dark grey, but should be them same as the article background. Looks like the css is the class “.mejs-container” located in wp-includes are the problem. Any recommendations how to get the colors ok? I have set up a child theme for the time being.
The dark grey color is actually part of the video code from WordPress. If you want to get rid of the dark grey, I would recommend updating the video component and set the width to “content” This will help make the section narrower.