Question about flash media server

Im thinking about buying this product for streaming my videos online
ive seen a couple websites such as http://www.vimeo.com/ and
http://tinypic.com/player.php?v=1okehs&s=4&hid=1&tag=superbad

the players for the media on these websites have been customized by the look of it ,, sorry if im wrong im all new too this .

how does this work ?
Do i need to install flash media streaming server and then a different player as well ?

Or do I need media server interactive too do this kinda thing

Any help much appreciated

Thanks in advance!