LCCS is a hosted service only solution, so if you want an on-premise solution it will not work for you. In any case it comes with a Flex SDK library with some prebuilt component (chat, webcam, roster, etc.) that allow you to quickly prototype an application or you can use the lower level "messaging" services and build your component on top.
If you want an on-premise solution you'll have to look at hosting your own Flash Media Server (FMS) and build your application from scratch. There are a lot of samples both from Adobe and our developer community for video chats, but you'll probably need to build your own scaffolding (authentication, room creations, etc.)
For more info you can post your questions on the FMS forum.