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

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

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