It seems Flash 8 solves one of the biggest problems i had with locally loaded, progressive flv files.
The problem was that only one client could connect to the same flv at the same time.
It seems that it was a bug in the Flash Player 7.19. I tried it with Flash 8 beta – and it worked!
I used this standalone wrapper.
I would like to test it with a previous flash 7 (7.14) standalone player but couldn`t find a link to it.
I know their is this macromedia archive for old players but it only archives browser plugins.

But it all looks quite promising.