What device is typically used to record video in a CCTV setup?

In a CCTV (Closed-Circuit Television) setup, the recorder plays a crucial role as it is responsible for capturing and storing the video footage from the cameras. This device operates by receiving video signals from the camera, encoding them, and saving them for later retrieval. Recorders, such as Digital Video Recorders (DVR) or Network Video Recorders (NVR), ensure that the video is not only stored securely but can also be played back when necessary, either for surveillance purposes or to review incidents.

The camera is essential for capturing the visual information, but it does not store or record that information. Similarly, while a storage device is involved, it is the recorder that manages the recording process, including compression and format handling. The monitor displays the live feed or recorded footage, but it does not have any function in recording the video itself. Therefore, the recorder is the key component in this setup, making it the correct answer.