FLV or Flash Video is a format that can be played by the Adobe Flash Player. This format is used extensively by sites such as YouTube, Google Video and MySpace. As most web browsers now support Adobe Flash Player (also known as Macromedia Flash Player) this provides a universal means to display video over the Internet.
Some FLVs created with a later version of Flash may fail to play correctly. If an FLV fails to play in your Flash Player 8 then we recommend upgrading to the latest version of Flash Player. To do this, go to http://www.adobe.com/ and look for 'Get Adobe Flash Player'.