I saw an eBay post for Innovation DreamMovie and hunted down the lost image. It's .cdi.

[JakobAir]

The posting is here: https://www.ebay.com/itm/233974300139?hash=item3679f47deb:g:aZcAAOSwvAhgfdqa

Here are the images from the post: https://imgur.com/gallery/oIPoY00

And here's the image: https://github.com/JakobAir/Dreamcast/blob/master/DreamMovie.7z

Cheers!