Part 1: What is F4V?

F4V is a video file format which is developed by Adobe Flash. F4V files belong to HD video. Since videos in F4V format are usually encoded in H.264, the F4V format is based on the format specified by ISO/IEC 14496-12: ISO base media file format. The Adobe Flash Player has been able to play F4V files with SWF files published for Flash Player 9 Update 3 (9,0,115,0).  A large part of the F4V format involves metadata. When Flash Player loads an F4V file, various stream properties are made available to a running ActionScript program via the NetStream.onMetaData property. The available properties differ depending on the software used

More about H.264:
H.264 is a standard for video compression, and is equivalent to MPEG-4 Part 10, or MPEG-4 AVC. H.264 is the next-generation video compression technology in the MPEG-4 standard, also known as MPEG-4 Part 10. H.264 can match the best possible MPEG-2 quality at up to half the data rate.

How to Download F4V files?

As we know, F4V Video format is supported by Youtube, Google Video, MySpace, Metacafe, Dailymotion, iFilm, Music, eVideoShare, StreetFire, and other more video-sharing websites. And if you want to download F4V/FLV files easily, you can use this freeware- YouTube FLV Downloader, which can automatically capture web page URL with playing videos for download, and support multiple browsers: IE, Firefox, Maxthon, Safari and 360SE.

Part 2: How to play F4V Video?

Because F4V is a newly-developed Video format, not all the player can support it. Here, we'll introduce the players.

Desktop-based: VLC media player; MPlayer, xine, totem

Web-based: Flash Player 9 update 3; Free FLV Player; FPlayer,