Overlay multicast is now widely used to provide high quality audio and video service, which requires more on its performance. We proposed an application layer multicast mechanism, which is called MO-Video (Multicast Overlay Video), based on combination of Central-control and Distributed self-organization. This mechanism that is highly organized is stable and suitable for live media streaming service. In MO-video network, the media stream is pushed to all users instead of request for data. On the other hand, the network is organized by different areas, which managed by one control node to minimize the message cast and schedule for the data transmission. The cooperation of control nodes, and the synchronously data sending by the senders, provide a better performance to all users and effectively avoid data redundancy. At the end of the paper simulations and experiments is delicately designed to show the advantage of MO-Video and convince us that it will be a promising mechanism in overly multicast.