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

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

axl   bxl   cxl   dxl   exl   fxl   gxl   hxl   ixl   jxl   kxl   lxl   mxl   nxl   oxl   pxl   qxl   rxl   sxl   txl   uxl   vxl   wxl   xxl   yxl   zxl   0xl   1xl   2xl   3xl   4xl   5xl   6xl   7xl   8xl   9xl