How to add Extra DVDs?

[jellyfin]

If the extras belong to the same movie, why would they need to be an entirely separate folder?  Doesn't matter that it is a separate disk.  A LOT of extras are on entirely separate discs.  They are extras for that movie.  But on a separate disc.

The names for your extras is almost 100% arbitrary (there are a few reserved words).

I just like to have separate DVDs in distinct folders.
And when extra DVDs belong to a certain movie, it is OK for me to add them into a OTHER or FEATURETTES sub-folder.
But when the DVD does not really belong to a movie, I don't like to do this.

Sadly Jellyfin forces me to do this, as EXTRAS in a a separate folder (without a an actual movie) do not show up at all - even in "Folder" mode.
And adding them in their own folder but not within some EXTRAS folder let's them show up as separate movies each.

So, no good solution here.

I finally did it like this, added regular extras of a movie to it's EXTRAS sub-folder, while separate extra DVD of a movie did go into the OTHER and FEATURETTES sub-folders.
And for the extra DVD, I just but them into the FEATURETTES sub-folder of the last of the movies - not idea, to be honest.

I think, the better solution would be to scan sub-folders and remain at the standards otherwise.

This way, separate extra DVDs could have their own folder, which is empty beside one EXTRAS folder and would not show up as movie, but the content from the EXTRAS sub-folder would show up in "Folder" mode.
That would be a clean way to handle this common situation.

Thanks for your help!