Flow-control based switched group video chat and real-time interactive broadcast

Real-time interactive broadcast sessions for client devices include: for each client device in the interactive broadcast session, configuring downstream video and audio ports for the interactive broadcast session between a central controller and the client device; receiving from each client device a selected broadcaster corresponding to a broadcaster flow control signal; in response to receiving the selected broadcaster from each client device, sending video and audio streams of the selected broadcaster to each client device over the interactive broadcast session; receiving a request from a given client device on the interactive broadcast session to interact with the selected broadcaster; configuring upstream and downstream video ports for one-to-one video chat session between the central controller and the given client device; and sending the video and audio streams of the given client device, and the video and audio streams of the selected broadcaster, to each client device over the interactive broadcast session.