I have VLC and it is awesome for full screen movie watching and it plays every media file almost. If you have yum configured and manages to install yumex, just type VLC into the search feature in yumex and add it to your que and install it. For full install instructions on configuring yum and yumex and installing it go
http://tictech2.blogspot.com/2007/01...yellowdog.html Those instructions also work for Mplayer.