I'm not realy sure if I understand it correctly but here is what you need to do,

if you have an FLV file, then you need an FLV player, a simple one which can easily be created in Flash itself to play it. once its cretaed , then you'll have
a swf to play the FLV and the skin for the player
and the FLV itself

you need to upload all of the 3 files in the same folder on your server.