DVR File Permissions on Linux

All of the recordings by Plex on my Linux server give access permissions to the ‘plex’ user/group (i.e. -rw------- 1 plex plex). This works fine for the plex server and clients. I would also like to give access to applications running as a different user. Normally, I would just add the user to the ‘plex’ group, but the group permissions are disabled. As a workaround, I’ve set up a cron job to change the permissions.

Is there a way to configure Plex to grant read permission to the group (i.e. -rw-r----- 1 plex plex)?