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

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

a4v   b4v   c4v   d4v   e4v   f4v   g4v   h4v   i4v   j4v   k4v   l4v   m4v   n4v   o4v   p4v   q4v   r4v   s4v   t4v   u4v   v4v   w4v   x4v   y4v   z4v   04v   14v   24v   34v   44v   54v   64v   74v   84v   94v