Abstract: A video data communication system, method and computer program for providing interactive video communications to a remote user is disclosed. The system comprises a compositing, compression and encoding system and an interaction engine. The compositing, compression and encoding system is arranged to composite, compress and encode video data for transmission to the remote user. The interaction engine is arranged to receive interactions from the remote user and is responsive to communicate with the compositing, compression and encoding system to cause a change to said compression and transmission during interaction with a remote user.