UMplayer – Universal Multimedia Player is a cross-platform media player written under the Qt platform. It uses the award-winning MPlayer software as its back-end engine, thus is able to play the most known audio & video formats without any need of external codecs. And it has a cool feature that it has the ability to search, play, and record YouTube videos.
UMPlayer is the multimedia player that fills all your needs. With dozens of advanced features and built-in codecs it can handle any media format, and can play Audio CDs, DVDs, (S)VCDs, TV / Radio cards, YouTube™ and SHOUTcast™ streams and even incomplete or damaged media files. UMplayer comes default with over 270 built-in Audio and Video codecs UMPlayer can handle nearly all media formats, including AAC, AC3, ASF, AVI, DIVX, FLV, H.263, Matroska, MOV, MP3, MP4, MPEG, OGG, QT, RealMedia, VOB, Vorbis, WAV, WMA, WMV, XVID and many more.
sourceforge.net provides .deb packages for Ubuntu 10.04, 10.10, and 11.04.