I think you can do that, there is an informal standard for xml files which can live alongside the media with metadata info. I'm not sure if Jellyfin can create

I think you can do that, there is an informal standard for xml files which can live alongside the media with metadata info. I'm not sure if Jellyfin can create them directly but it can read them. See for example tinymediamanager https://www.tinymediamanager.org/ https://www.tinymediamanager.org/