Video cameras; electronic switchers for video signals; video and audio/visual systems and components, including, audio microphone mixers, and systems that capture, transmit, or record video and audio during meetings or presentations; video and audio/visual system controllers, including, controllers that power on/off, select audio/video sources for, or operate indirectly, such video cameras, electronic switchers, systems, components, cables, and peripherals; video and audio/visual systems and components consisting of controllers and computers which provide automated motion tracking that follows a moving presenter