How to play flv files<br>Navigate to videolan's official website at http: // www.videolan. Org /. Select the option to download the videolan vlc media player to your windows or mac computer. Double-click on the installer file to launch the videolan installation wizard, and follow the on-screen prompts to install the media player on your computer.
Windows is all you need for flv files
A mac computer can also run windows therefore when the option to download on your windows or mac computer can be ambiguous 
( z1 need :ARG0 ( z2 you ) :ARG1 ( z3 product :name ( z4 name :op "Windows" ) :mod ( z5 all ) ) :purpose ( z6 file :mod ( z7 format :name ( z8 name :op "Flv" ) ) ) )