1. Client A and Client B connected to stream `sample.mp4`
2. I have watermark detector application. If watermark detector detect specific watermark on `sample.mp4`. It will tell wowza to switch from `sample.mp4` to `advertising.mp4`. And the result, All connected clients(client A and client B) will switch to `advertising.mp4`.
The questions are How to tell all connected clients to switch from `sample.mp4` to `advertising.mp4`?