You can get a JW Player or another player and broadcast live streams with red5 or any other server. You can easily broadcast a live video stream with sound from you mic and video from your web-cam.... Just read more about live RTMP streaming with red5 and JW Player.

The problem is that you need video conferencing, it means that at least two people should be able to talk to each other and preferably see videos of each other. Streaming servers can probably do that, but I'm not an expert in this field. Ask the red5 community about it.