You can configure Rhythmbox to act as central media server using its built in plugin support. Using this ability you can access your media(music or videos) from remote location.
First you need to install python-coherence package.
sudo apt-get -y install python-coherence
Now open Rhythmbox >> Edit >> Plugins and check DLNA/UPnP sharing and control support. From now onwards when ever you start rhythmbox all of your UPnP compatiable devices and software applications will show the Rhythmbox served media server.