We've added an incremental release of a feature we're working on, even though it's still in development, and there's still more work to do.
Try it now: https://beta.meetingroom365.com/#/style
From here, you can preview various styling and customization options, including animated backgrounds, color changes, and CSS tweaks.
Just use the menu on the right, and you'll see the result on the left. When you're done, copy and paste the CSS and background image/video URL into your display configuration.
And be sure to reach out if you run into any issues customizing your display! We've added a ton of features and flexibility, which can be a bit daunting (especially if you're not an expert in Web Development technologies).
Send us a message & let us know what you'd like to do!