We would like to stream live video to our branch offices with the need to switch from video to a PowerPoint and back during the broadcast. What is the best way to do this? After some experimentation it seems that streaming video is easy, but I'm just not sure about how to switch back and forth between two sources. We probably have most of the hardware needed. I guess I need a solution that will allow us to switch between a PowerPoint and live video easily, without turning it into a huge production.