M4V File Extension- What's M4V format

MPEG-4 file extension used for videos downloaded from the Apple iTunes store; includes TV episodes, full-length movies, and music videos; similar to an .MP4 file, but may be copy-protected using Apple's FairPlay DRM copyright protection.

To play a protected M4V file, your computer must be authorized (using iTunes) with the account that was used to purchase the video.

Unprotected M4V files may be recognized and played by other video players by changing the file extension from ".m4v" to ".mp4." 

Besides Apple iTunes and Apple QuickTime Player, M4V files can also be opened and played with the version of Windows Media Player included with Windows 7, Media Player Classic, RealPlayer, VLC media player and Nero Showtime (included with Nero Multimedia Suite). The format, with DRM removed, can also be played in the webOS Video Player for use on the Palm Pre, Palm Pixi smartphones. It is also playable by the Android operating system with its video player. It can also be played with the BS Player Pro.

M4V to FLV Converter for Mac enables users to remove DRM protection from iTunes purchase M4V movies and TV shows and convert iTunes M4V to FLV for uploading to video streaming sites such as YouTube, Metacafe, facebook, iFilm, etc.

If you have downloaded flv or HD flv video downloaded from YouTube, Hulu, VEVO, Yahoo! Video, metacafe, and other video-share websites and wanna convert FLV files to MP4 for play on iPad, iPhone and iPod or edit on iMovie, FCP or for being embedded in PowerPoint, here this FLV to MP4 Mac is your best helper to convert FLV files to MP4 for Mac OS X. (Snow Leopard, Lion included). including MPEG-4 MP4(.mp4), MPEG AVC(.mp4), and H.264(.mp4).