*AVI(.avi)**	Stands for Audio Video Interleaved, storing sound and moving pictures in RIFF format developed by Microsoft. An AVI file can use different codec and formats so there is no set format for an AVI file unlike for example standard VCD video which sets a standard for resolution, bitrates, and codec used.
*MPEG(.mpg)**	An ISO/ITU standard for compressing video offering lossy compression technique (some data of the original image is lost during the compression).
*MP4(.mp4)**	MP4 is a new container format, a container format allows you to combine different multimedia streams into one single file. Multimedia containers are for example the well known AVI, MPEG, Matroska, OGM. MP4 is the global file extension for the official container format defined in the MPEG-4 standard. MP4 is streamable and supports all kinds of multimedia content, multiple audio-, video-, subtitle streams, pictures, variable-frame rates, -bitrates, -samplerates...) and advanced content like 2D and 3D animated graphics, user interactivity, DVD-like menus.
*WMV(.wmv)**	(Windows Media Audio) is an audio data compression technology developed by Microsoft. It can be played by Windows Media player, RealPlayer, Winamp, Windows Movie Maker, and the Microsoft Zune media management software supports most WMA codec. Its audio quality is better than mp3 when the bitstream is below 128kbps, but won't get much improvement when the bitstream gets higher.
*MKV(.mkv)**	The MKV format (Matroska Video) is an entirely free video format. More precisely, it is a container (hence the name Matroska, in reference to the Russian dolls contained within another) making it possible to contain video (DivX, Xvid, RV9, etc), sound (MP3, MP2, AC3, Ogg, AAC, DTS, PCM), as well as subtitles (SRT, ASS, SSA, USF, etc) in the same file.
*MOV(.mov)**	QuickTime Content (.mov, .qt) a file format developed by Apple Computer to create, edit, publish, and view multimedia files. QuickTime supports video, animation, graphics, 3D and virtual reality (VR).
*RM(.rm)**	RM stands for Real Media. Real Media is one of the most popular formats for streaming content on the Internet, RealMedia includes the RealAudio codec for sound clips and RealVideo codec for movies. RealAudio and RealVideo files are often given the common RealMedia ".RM" file extension. RealMedia files are often heavily compressed so they can stream over dial-up Internet connections.
*3GP(.3gp)**	The H263 encoder based video format used in mobile terminals, like cell phones.
*FLV(.flv)**	FLV files (Flash Video Files) are a binary file format that delivers "bitmapped" video, limited to one video and one audio stream per file, over the Internet to the Macromedia Flash Player version 7. FLV content may also be associated with SWF files by ActionScript external references. FLV format can also be imported into Macromedia Flash Authoring tool.
*SWF(.swf)**	SWF (originally an abbreviation for "ShockWave Flash" this was changed to the backronym "small web format" to eliminate confusion with Shockwave, from which it was derived) is a file format for multimedia, vector graphics and ActionScript in the Adobe Flash environment. Originating with FutureWave Software, then transferred to Macromedia, and then coming under the control of Adobe, SWF files can contain animations or applets of varying degrees of interactivity and function.
*VCD(.mpg)**	Video CD (abbreviated as VCD, and also known as View CD, Compact Disc digital video) is a standard digital format for storing video on a Compact Disc. VCDs are playable in dedicated VCD players, most DVD-Video players, personal computers, and some video game consoles.
*DVD(.vob)**	All DVD movies are stored in on a DVD video disc in so-called VOB files. VOB files usually contain multiplexed Dolby Digital audio and MPEG-2 video. VOB files on a DVD are numbered as follows: vts_XX_y.vob where XX represents the title and Y the part of the title. There can be 99 titles and 10 parts, although vts_XX_0.vob does not contain any video, usually just menu or navigational information. You can find them on a DVD video disc in a subdirectory labeled VIDEO_TS (all upper case).