Youtube Interface for Adobe FMS

Can you elaborate what exactly you are looking for. If i understand you right - your question is basically how to develop youtube like client - Am i right?

If i got you right - you need to develop client using Flash Authoring and taking care to include features which youtube client offers - its more of client side programming rather than server-side. Your client will interact with FMS to deliver streams which are asked (apart from many other things - you want server to do) - but what client interface looks like will depend on how you design it using Flash Authoring tools