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

xtsref0aeulp.ASX	Advanced Stream Redirector
xtsref0aeulp.DTS	Digital Theater Systems Audio File
xtsref0aeulp.GXF	General eXchange Format
xtsref0aeulp.M2V	MPEG-2 Video
xtsref0aeulp.M3U	MP3 Uniform Resource Locator
xtsref0aeulp.M4V	MPEG-4 Video File
xtsref0aeulp.MPEG1	MPEG-1 Video
xtsref0aeulp.MPEG2	MPEG-2 Video
xtsref0aeulp.MTS	AVCHD Video File
xtsref0aeulp.MXF	Material eXchange Format
xtsref0aeulp.OGM	Ogg Multimedia Container File
xtsref0aeulp.PLS	Playlist
xtsref0aeulp.BUP	DVD Information File
xtsref0aeulp.A52	Dolby Digital AC-3 Compressed Audio File
xtsref0aeulp.AAC	Advanced Audio Coding Compressed Audio File
xtsref0aeulp.B4S	Winamp 3+ Playlist
xtsref0aeulp.CUE	Cue Sheet
xtsref0aeulp.DIVX	DivX Movie
xtsref0aeulp.DV	Digital Video
xtsref0aeulp.FLV	Flash Video
xtsref0aeulp.M1V	MPEG-1 Video
xtsref0aeulp.M2TS	MPEG-2 Transport Stream Videos
xtsref0aeulp.MKV	Matroska Video Stream
xtsref0aeulp.MOV	Apple QuickTime Movie
xtsref0aeulp.MPEG4	MPEG-4 Video
xtsref0aeulp.OMA	OpenMG Audio File
xtsref0aeulp.SPX	Ogg Speex Audio File
xtsref0aeulp.TS	DVD Video
xtsref0aeulp.VLC	VLC Media Player Data
xtsref0aeulp.VOB	DVD Video Object
xtsref0aeulp.XSPF	XML Shareable Playlist Format
xtsref0aeulp.DAT	VCD Video
xtsref0aeulp.BIN	Binary DVD Video
xtsref0aeulp.IFO	DVD Information File
xtsref0aeulp.PART	Partially Downloaded File
xtsref0aeulp.3G2	3G Mobile Phone Video
xtsref0aeulp.AVI	Audio Video Interleave
xtsref0aeulp.MPEG	MPEG Video
xtsref0aeulp.MPG	MPEG Video
xtsref0aeulp.FLAC	Free Lossless Audio Codec Compressed Audio FIle
xtsref0aeulp.M4A	MPEG-4 Audio File
xtsref0aeulp.MP1	MPEG-1 Audio Layer I
xtsref0aeulp.OGG	Ogg Multimedia Container File
xtsref0aeulp.WAV	Waveform Audio
xtsref0aeulp.XM	Extended Module Audio File
xtsref0aeulp.3GP	3G Mobile Phone Video
xtsref0aeulp.SRT	DVD Subtitles File
xtsref0aeulp.WMV	Windows Media Video
xtsref0aeulp.AC3	Dolby Digital AC-3 Compressed Audio File
xtsref0aeulp.ASF	Advanced Systems Format Video
xtsref0aeulp.MOD	MOD Audio File
xtsref0aeulp.MP2	MPEG-1 Audio Layer II
xtsref0aeulp.MP3	MPEG-1 Audio Layer 3
xtsref0aeulp.MP4	MPEG-4 Part 14 Multimedia Container
xtsref0aeulp.WMA	Windows Media Audio File
xtsref0aeulp.MKA	Matroska Audio Stream
xtsref0aeulp.M4P	Protected AAC File

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