What program do i need to use so i can open a file with an extension .flv on my macbook. i have os 10.6.8
Just use VLC
to make VLC the default application that opens FLV files, right click the FLV file and then choose Get Info.
a tall window will appear. one of the options is Open With. then you can choose vlc from the pull down menu.
Then you choose change all.
Flash Player can be a stand alone app depending on which one you're using.
It is limited where VLC can play almost any video format you throw at it. It can also play most sound files. it's really all you need now.