Permissions Issue on Media folder

[villumanati 0]

I am having issues with permissions for the configuration of Emby on Fedora system. All my media is located in

/home/trb/oldServerBackup/oldServerBackup/Videos/Videos

I ran ls -l on this directory and see the following permissions:

drwxr-xr-x. 90 trb trb 8192 May 26  2015 Videos

I am under the assumption that this folder should be apart of they emby group so i attempted to run the command
 

 chgrp -R emby Videos

And was told that I have an invalid group

chgrp: invalid group: ‘emby’

I verified both the emby user/group exist on my system. What do I need to do in order to allow emby to have read access on this directory so I can complete my configuration