Types of Home Video Surveillance
According to the Home Security Information site, there are two types of home video surveillance: covert and overt. Covert systems employ hidden cameras (i.e. nanny cams disguised as teddy bears), in order to identity the thief without them ever knowing it. There must be something appealing about this, because a lot of people are interested in hidden video cameras. Must be the voyeurs in us. In truth, an overt system, or one where the cameras are prominently displayed, is more of a deterrent for thieves. They see the cameras, assume you have a good home security system, and decided to bother someone else. With a covert system, even if you ID the thief, he's still made off with your belongings, and they'll probably be pawned long before the police ever catch the thief (if they do.)
Read the whole article for more on home video surveillance information.