In the MythTV 0.22 frontend, why are the default settings blank? Why are these not populated to the correct content directory?
MythTV 0.22 introduces Storage Groups for MythVideo. These are setup by default for you in mythtv-setup, and will conflict with the local frontend settings if the paths are the same. Local MythVideo settings will not use the MythTV protocol to transfer videos between your frontends. See MythVideo - Local Video Storage