This is an "unofficial" xine release. "Unofficial" just because the xine project does not officially distribute any binary or compiled packages. xine is free software and the source code is always available and licensed under GPL. "Linux DVD Player" is here so you can google for it ;-)
The provided RPMS are built automatically everyday from xine's Sourceforge CVS. This is all you need to play DVDs in linux (with full menu support) and the other media formats xine can handle. For more information please check the xine homepage.