Simple Frontend for MPlayer/FFMpeg/Phonon and Video Player Plugin for Konqueror
http://kmplayer.kde.org/

KMPlayer, a simple frontend for MPlayer/FFMpeg/Phonon.
It can play DVD/VCD movies, from file or url and from a video device.
KMPlayer can embed inside konqueror. Which means if you click
on a movie file, the movie is played inside konqueror.
It can also embed inside khtml, enabling movie playback inside a html page.