iTunes/Apple TV movie backgrounds

Hi everyone,

I was wondering if it was possible to add background images (like the one shown in the picture below) to local M4V/MP4 movies (not purchased from Apple) in my iTunes library so that they are shown when I view movies via Home Sharing in the Computers app on my Apple TV 4. Or are these only shown in the iTunes Movies app when renting/buying movies?

Currently only the movie artwork is displayed and the background color is changed to match the artwork, like this:

Thanks in advance for any answers!