Carrying on the rich hacker tradition of picking up the slack for companies that are unwilling or unable to provide the functionality users need, a team of Wii coders have given the console what Nintendo could not: DVD playback. By installing a small, hidden channel on a system, this package blesses the console with a libdi file (DVD access library), and allows you to watch your favorite videos with the MPlayer application, an open source media player. The install file will run on modded and unmodded systems, and the software is also capable of playing media from SD cards (though it’s experimental right now). Finally Wii owners can join the ranks of, well… pretty much everyone else.
Origin: http://www.engadget.com/2008/08/13/the-wii-finally-gets-dvd-playback-no-thanks-to-nintendo/