The repository was taken offline in 2013 with the following announcement:
The end of Medibuntu
Medibuntu is going down.
The project is not really needed nowadays, except for one package: libdvdcss. This package is now maintained by Jonathan Riddell at Blue Systems. It is available in a repository hosted by VideoLAN. [...]
From gpocentek's blog
Where to find...
- libdvdcss is now hosted at videolan.org.
- Components of w32codecs/w64codecs are still hosted at the MPlayer project site.