Gated Communities sometimes run programs like neighborhood watch and might even pay for security guards. Many offer a lot more amenities but there seems to be a lack of video surveillance among them. Video Surveillance can help prevent crimes such as break-ins by placing signs at entrances or by having the cameras out in the open for everyone to see.
Neighborhood Watch is a great program but Video Surveillance can help by giving police some footage of a burglar or other criminal while a witness may not be able to remember or might have had a hard time getting a good look. Neither are foolproof but together they can be a great combination.
When burglaries have happened there is an increased chance of catching the criminal if there is footage available for police to go over. Video footage has helped law enforcement time and time again. There could also be some room for interpretation with just eye witness testimony, but with video there is less room and it could also help someone who was falsely accused of a crime.