Library are mounted as docker volumes, symlinks across volumes mostly don't work in docker.
You can effectively use multiples directory by manually editing the docker-compose.yml file. You'll need to change

  volumes:
    - ${LIBRARY_ROOT}:/video:ro

by

  volumes:
    - /ssd/media:/video/ssd:ro
    - /ssd4tb/media:/video/ssd4tb:ro

If you do change that, you'll need this edit in two places: in the x-transcoder's volume definition and in the scanner's volume definition.

If this is something that people often needs, we might want to look into easier ways of doing that ; for example using reusable volumes scopes for the transcoder/scanner.

(i'm closing this, but feel free to comment if you need more help!)

Hi! I'm on the same boat with:

/mnt/user/data/media
/mnt/user/zfs_data/media

Also it would be nice to be more specific what folders we want here. Let's say:

/mnt/user/data/media/movies
/mnt/user/data/media/tv
/mnt/user/zfs_data/media/anime
/mnt/user/zfs_data/media/animemovies