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 comprised of cameras, microphones, cables and digital video recorders; video and audio/visual system controllers, including, electrical controllers that power on/off, select audio/video sources for, or operate indirectly, video cameras, electronic switchers, audiovisual systems, audiovisual components, cables, and peripherals; video and audio/visual systems consisting of electrical controllers and computers which provide automated motion tracking that follows a moving presenter; video and audio/visual components, including, electrical controllers and computers which provide automated motion tracking that follows a moving presenter