Flv File Extension
Flash Video File is a extension of internet video files. It can be opened by Flv Player.
Flv is a internet video files specially created for using with Adobe Flash software. Despite its low image quality, it is commonly seen on internet.
It can be opened by FLV player. In addition, after installing Fddshow or Klite package it can be watched by Media Player.
There are many different softwares that allows you to convert flv files to the other video types.
What needed to Open Flv file extensions.
Flv Player, GOM Player, Videolan
Links about Flv file extension