FLV: Flash Video is a container file format used to deliver
video over the Internet using Adobe Flash Player versions 6–10.
Flash Video content may also be embedded within SWF files. There
are two different video file formats known as Flash Video: FLV
and F4V. The audio and video data within FLV files are encoded
in the same way as they are within SWF files. The latter F4V
file format is based on the ISO base media file format and is
supported starting with Flash Player 9 update 3.Both formats are
supported in Adobe Flash Player and currently developed by Adobe
Systems. FLV was originally developed by Macromedia. Flash Video
has been accepted as the default online video format by many
sites. Notable users of it include YouTube, Hulu, VEVO, Yahoo!
Video, metacafe, Reuters.com, and many other news providers.The
standards documentation for BBC Online states that the BBC now
preferentially accepts Flash videos for submission, to the
disadvantage of other formats previously in use on its sites
such as RealVideo or