w3bd3vil means which Distribution are you using and there are a lot.....
Like fedora or Suse or Debian or Mandrake or... or...
And then we can start to help you.
But if you already know yum or apt then you just can invoke the following commands to get all the files you will need.
#yum install xine*
#yum install mplayer*
(you will need to do some changes in your repo files, therefor visit www.dag.wieers.com
or rpm.livna.org and freshrpms, atrpms)
After you've done that you will be able to play those files.
But remember to have the latest XFree Version and Video Driver.