Okay, this is what you have to do :
First : go to this site :
Okay, choose contrib, main, updates,
plf-free, plf-nonfree), choose a mirror next to where you live.
Follow the steps so that you can add the lines at the bottom of the page in a
terminal console, logged as root. (To change normal user, symbolized by a $ sign
type 'su', then your root password you have set at install). Cut and paste them, it's easier.
Now, go to MCC ===> RPMDrake (or whatever the name is now), it will ask if you want to
update your sources, say yes and then choose those in your packages list :
w32codecs (to read win videos)
Kaffeine or Mplayer (if you have it), or Totem should play your DVDs now