It would be amazing if someone from Emby could document what metadata tags can be used for each file type. Here are the "supported" (utilized) quicktime tags I've found through testing: For images (png, jpg), I've only been able to get the "Title" XMP tag to work. All others (description, copyright, genre, and so on) don't work. It's a mystery when/if/how emby uses embedded metadata. I'd be so appreciative if an emby developer with access to the closed-source code could document this