Reorganize custom files/folder structure movies library

[bitbonk]

The files belonging to my movies library reside in a single folder named movies as a flat list with no subfolders, something like this

Veit Harlan - (1944) - Opfergang-backdrop.jpg
Veit Harlan - (1944) - Opfergang-poster.jpg
Veit Harlan - (1944) - Opfergang.mkv
Veit Harlan - (1944) - Opfergang.nfo
W. W. Young - (1915) - Alice in Wonderland-backdrop.jpg
W. W. Young - (1915) - Alice in Wonderland-landscape.jpg
W. W. Young - (1915) - Alice in Wonderland-logo.png
W. W. Young - (1915) - Alice in Wonderland-poster.jpg
W. W. Young - (1915) - Alice in Wonderland.mkv
W. W. Young - (1915) - Alice in Wonderland.nfo

• It is a flat list of files with no subfolders at all (except the .trickplay folders that are also in there).
• the name of the movie file is always director - (year) - tile.mkv (sometimes .mp4)
• All movies were already manually identified via the web UI and the IMDB ID.
• Many of the images are custom images made by myself.
• After identifying the movie via, IMDB the NFO file received a lot of customization (like additional genres, replacing the English title with the original title etc., correcting factual mistakes that ended up in the NFO file after identification)

Now the way I understand Jellyfin, it is not ideal to store movies using this structure because I can't have alternative versions of the same movie and I would guess that this also not so good for performance.

Now my question is, how can I convert this file structure to the suggested structure explained here without loosing any metadata - maybe not even the watch history, favorites or collections that I already built and that are store elsewhere in the Jellyfin DB.

I am comfortable writing a script that restructures the whole movies folder. But will Jellyfin pick up those changes gracefully.
Maybe there is a better way to do this?

[bitbonk]

I ended up writing a script that reorganized all movies in a folder structure as described here

The Movie Title (2021) [imdbid-tt12801262]
├── The Movie Title (2021) [imdbid-tt12801262].mkv
├── movie.nfo
├── backdrop.jpg
├── logo.svg
├── landscape.jpg
└── folder.jpg

and then I rescanned the whole library. The artwork and the metadata stayed the same. I only had to re-add the movies to the collections I had created earlier. Everything else just worked.