mp4 on AppleTV 4K with episode-specific images in addition to series cover

Anyone know how to load an mp4 video file with covers for not only the series, but additional images for each season, and each episode (up to 3 images total)? I would like for this to work with AppleTV 4K 3rd gen, using itunes for windows with home sharing, so each season has it's own cover, and each episode has a screen shot. I'm not entirely sure this is possible, but I've read a few things that indicate Apple does this for TV shows in their store. I'm looking to do this for files that I create rather than those bought from Apple. I know mp3tag can put multiple images in a file, but not sure specifically how to do this in a way that itunes recognizes.

I use AppleTV and iTunes for hosting movies and TV Shows in my home. I have only ever had consistent success with using the season cover as the only image on each episode. I have not been able to get an additional cover for the entire series or individual episodes to work in my case for the files I have ripped.

Apple has a funny way of adding features from their end that we cannot access.

Yes, they are not stored in the MP4 files.

Thanks for letting me know. I was afraid this wasn't possible.

The closest you get is to add a cover for each season and if you use 1080p or lower you typically will automatically get a random screenshot as well. But it is only possible to use one image per media file.