Video extenders are devices that allow you to transmit video signals over long distances, often beyond the limits of standard cables. They work by converting the video signal into a format that can be sent through various mediums, such as HDMI, VGA, or Ethernet cables. This is particularly useful in settings like offices or classrooms, where displays may be far from the source device. These extenders can support high-definition video and audio, ensuring that the quality remains intact even over long distances. Some models also offer additional features, such as IR remote control support, allowing users to control devices from afar.