My university wants to implement new method of remote teaching using video conference. A lecturer from the center should read a lecture to the branch office in the separate city. The lecture session video must be recorded in digital format for later use. The session must be interactive, both sides should see each other. Besides other authorized people should have ability to connect to this session and spectate.
I was assigned task to organize, choose and implement this issue. I want to offer minimum 2 variants of video conference. The only one i've reviewed is using polycom system. Polycom is too expensive, so I need the other solution too if they run out of budget.