Basically the cameras send the information to a DVR (analog) or NVR (digital). The DVR or NVR records the information onto the hard-drive. It will also show the captured information on a monitor as well as stream it across the internet to your mobile phone, laptop or tablet.
Sam had just installed CCTV at his shop. One day, he noticed a group of teenagers loitering outside his shop. He quickly accessed the live video feed on his phone and watched as the group attempted to break into his shop. He was able to call the police and provide them with a description of the suspects, which led to their arrest. This is how CCTV works.
