FLV is a Flash video format which is specially designed to deliver multimedia video to broad audience over the Internet. Usually, it is embedded into SWF file or located elsewhere and called by ActionScripts. Alternatively, it may be broadcasted using streaming server. The main advantage FLV files deliver is a compactness of the interactive on-line animation that has video insets (games, presentations, etc). As the result, Flash movie does not need to include the whole movie but load one on demand.

Indeed, you need a special player to be able to view FLV files. SWF & FLV Player is player for Windows that lets preview and play FLV. The procedure of opening and playing FLV does not differ from the one of SWF: select File -> Add to Playlist option from the main menu and navigate to the file you want to play in a pop-up dialog. Additionally, you may use "Download online Flash movies" option to search, preview and open FLV files at the certain web addresses.

Note, that FLV files playback is possible, when you have Adobe Flash Player ActiveX version not below 7 installed.