Let me try to take a stab at this: If you have video chat with 10 people, then you have peer connections with 10 people. Each person will have connections with

Let me try to take a stab at this: If you have video chat with 10 people, then you have peer connections with 10 people. Each person will have connections with 10 other people, resulting in 10x10=100 connections. With a streaming server, you would just need 1 connection to a server that would give you 10 media streams. With a streaming server, you can also do recording and stuff.