Not sure how to approach metadata for this one... (MST3K)

I've recently gotten into collecting Mystery Science Theater 3000 for my Jellyfin library. For those who aren't aware, it is technically a TV show, but each episode is a full length feature film. That being the case, these DVD sets tend to have a number of special features specific to each episode.

Now typically, you can create an 'Extras' directory specific to each season of a TV show, and that's where I would normally put the special features. In this case, however, I would prefer the special features to be grouped by episode, rather than being grouped by season. That doesn't seem to be possible in Jellyfin at the moment.

It could potentially work if I were to classify the episodes as movies, and put the special features in the movie directory instead, but neither TMDB or TTVDB classify MST3K episodes as movies, so I would have to write up all the metadata and images myself, instead of it being added automatically. That would take a lot of work, and it would also end up greatly inflating the size of my movie library.

Any suggestions on what I should do?