A video switch is a device used in video production to select and switch between multiple video sources. It allows operators to control which video feed is displayed or recorded, making it essential for live broadcasts, events, and video editing. Video switches can handle various formats and resolutions, ensuring compatibility with different equipment. These devices often come with features like transitions, effects, and audio mixing capabilities. They can be found in professional studios, broadcasting stations, and even in simpler setups for events. Popular brands include Blackmagic Design and Roland, which offer a range of models for different needs.