There shouldn't be a problem if you are using RTMP protocol, or using RTMFP Groups. Using RTMFP would mean that the "publisher" would have 200 unique connections to his computer. Unless he has 200Mb/s+ the latency will be so bad that the video will be unusable. I also believe there is a "max peers" option that has a limit. It's default to 8, but I'm not sure about the max.