VLC media player is an open source video and audio player capable of playing almost any type of media including DVDs and VCDs. In addition to being able to play most video and audio files, VLC can also post free ads without registration
File extensions that can be opened by vlc-media-player

uko.ASX	Advanced Stream Redirector
uko.DTS	Digital Theater Systems Audio File
uko.GXF	General eXchange Format
uko.M2V	MPEG-2 Video
uko.M3U	MP3 Uniform Resource Locator
uko.M4V	MPEG-4 Video File
uko.MPEG1	MPEG-1 Video
uko.MPEG2	MPEG-2 Video
uko.MTS	AVCHD Video File
uko.MXF	Material eXchange Format
uko.OGM	Ogg Multimedia Container File
uko.PLS	Playlist
uko.BUP	DVD Information File
uko.A52	Dolby Digital AC-3 Compressed Audio File
uko.AAC	Advanced Audio Coding Compressed Audio File
uko.B4S	Winamp 3+ Playlist
uko.CUE	Cue Sheet
uko.DIVX	DivX Movie
uko.DV	Digital Video
uko.FLV	Flash Video
uko.M1V	MPEG-1 Video
uko.M2TS	MPEG-2 Transport Stream Videos
uko.MKV	Matroska Video Stream
uko.MOV	Apple QuickTime Movie
uko.MPEG4	MPEG-4 Video
uko.OMA	OpenMG Audio File
uko.SPX	Ogg Speex Audio File
uko.TS	DVD Video
uko.VLC	VLC Media Player Data
uko.VOB	DVD Video Object
uko.XSPF	XML Shareable Playlist Format
uko.DAT	VCD Video
uko.BIN	Binary DVD Video
uko.IFO	DVD Information File
uko.PART	Partially Downloaded File
uko.3G2	3G Mobile Phone Video
uko.AVI	Audio Video Interleave
uko.MPEG	MPEG Video
uko.MPG	MPEG Video
uko.FLAC	Free Lossless Audio Codec Compressed Audio FIle
uko.M4A	MPEG-4 Audio File
uko.MP1	MPEG-1 Audio Layer I
uko.OGG	Ogg Multimedia Container File
uko.WAV	Waveform Audio
uko.XM	Extended Module Audio File
uko.3GP	3G Mobile Phone Video
uko.SRT	DVD Subtitles File
uko.WMV	Windows Media Video
uko.AC3	Dolby Digital AC-3 Compressed Audio File
uko.ASF	Advanced Systems Format Video
uko.MOD	MOD Audio File
uko.MP2	MPEG-1 Audio Layer II
uko.MP3	MPEG-1 Audio Layer 3
uko.MP4	MPEG-4 Part 14 Multimedia Container
uko.WMA	Windows Media Audio File
uko.MKA	Matroska Audio Stream
uko.M4P	Protected AAC File

auko   buko   cuko   duko   euko   fuko   guko   huko   iuko   juko   kuko   luko   muko   nuko   ouko   puko   quko   ruko   suko   tuko   uuko   vuko   wuko   xuko   yuko   zuko   0uko   1uko   2uko   3uko   4uko   5uko   6uko   7uko   8uko   9uko