1 advantage of the Closed-Circuit Television surveillance (CCTV) is that it can be used to monitor your children' and maid's activities while you are not at home. I f something happens such as abuse, you only need to look at the video to find out. Another advantage is that if a burglar or vandalism happens while you are away, you will be able to find out who it is and the suspect will not be able to deny it as the video can be use as an evidence against him.