A video interface is a system that allows different devices to communicate and transmit video signals. It connects devices like computers, televisions, and projectors, enabling them to display visual content. Common types of video interfaces include HDMI, VGA, and DisplayPort, each with specific capabilities and resolutions. These interfaces convert digital or analog video signals into formats that can be understood by display devices. For example, HDMI supports high-definition video and audio, making it popular for home entertainment systems. Understanding video interfaces is essential for ensuring compatibility between devices and achieving optimal video quality.