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

v9.ASX	Advanced Stream Redirector
v9.DTS	Digital Theater Systems Audio File
v9.GXF	General eXchange Format
v9.M2V	MPEG-2 Video
v9.M3U	MP3 Uniform Resource Locator
v9.M4V	MPEG-4 Video File
v9.MPEG1	MPEG-1 Video
v9.MPEG2	MPEG-2 Video
v9.MTS	AVCHD Video File
v9.MXF	Material eXchange Format
v9.OGM	Ogg Multimedia Container File
v9.PLS	Playlist
v9.BUP	DVD Information File
v9.A52	Dolby Digital AC-3 Compressed Audio File
v9.AAC	Advanced Audio Coding Compressed Audio File
v9.B4S	Winamp 3+ Playlist
v9.CUE	Cue Sheet
v9.DIVX	DivX Movie
v9.DV	Digital Video
v9.FLV	Flash Video
v9.M1V	MPEG-1 Video
v9.M2TS	MPEG-2 Transport Stream Videos
v9.MKV	Matroska Video Stream
v9.MOV	Apple QuickTime Movie
v9.MPEG4	MPEG-4 Video
v9.OMA	OpenMG Audio File
v9.SPX	Ogg Speex Audio File
v9.TS	DVD Video
v9.VLC	VLC Media Player Data
v9.VOB	DVD Video Object
v9.XSPF	XML Shareable Playlist Format
v9.DAT	VCD Video
v9.BIN	Binary DVD Video
v9.IFO	DVD Information File
v9.PART	Partially Downloaded File
v9.3G2	3G Mobile Phone Video
v9.AVI	Audio Video Interleave
v9.MPEG	MPEG Video
v9.MPG	MPEG Video
v9.FLAC	Free Lossless Audio Codec Compressed Audio FIle
v9.M4A	MPEG-4 Audio File
v9.MP1	MPEG-1 Audio Layer I
v9.OGG	Ogg Multimedia Container File
v9.WAV	Waveform Audio
v9.XM	Extended Module Audio File
v9.3GP	3G Mobile Phone Video
v9.SRT	DVD Subtitles File
v9.WMV	Windows Media Video
v9.AC3	Dolby Digital AC-3 Compressed Audio File
v9.ASF	Advanced Systems Format Video
v9.MOD	MOD Audio File
v9.MP2	MPEG-1 Audio Layer II
v9.MP3	MPEG-1 Audio Layer 3
v9.MP4	MPEG-4 Part 14 Multimedia Container
v9.WMA	Windows Media Audio File
v9.MKA	Matroska Audio Stream
v9.M4P	Protected AAC File

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