Mplayer CE is a fork of the Team Twiizers MPlayer port, combining elements of MPlayerWii and GeeXboX.

Changes:

Fixes for 4.2 update
Stability fixes (hopefully freezing is gone forever now)
Network (LAN and WAN) speeds increased
Added directory play feature
YouTube section entirely revamped
Added Nintendo Channel content (quality may not yet be optimal) (thanks to yellowstar6 for his work on ninchdl-listext)

Many, many more bugs fixed

http://wiibrew.org/wiki/MPlayer_CE