A video switcher is a device used in live video production to select and switch between multiple video sources. It allows operators to control which video feed is displayed, making it essential for events like live broadcasts, concerts, and sports events. Video switchers can handle various inputs, including cameras, graphics, and pre-recorded videos. These devices often come with additional features such as transitions, effects, and audio mixing capabilities. By using a video switcher, producers can create a polished final product that enhances the viewing experience for audiences, whether in-person or through streaming platforms.