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

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

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