CCTV has been in operation in a commercial sense for a long time now. The potential for video in security was recognised as soon as the technology was developed and it found application right away. Unfortunately, it was not until relatively recently in the development and improvement of this sort of technology that it actually achieved a really high standard of playback.
That level of quality is available these days and as such CCTV is now a very useful and productive addition to business security systems. Modern commercial CCTV systems are capable of a really high standard of playback which means they can be used to provide leads and evidence when security breaches are recorded in detail on camera.
The rapid advancement of the quality of this sort of technology means that it is advisable for those relying on older systems to update their security measures so they can see the benefit of more cutting edge CCTV technology. The investment is a particularly worthwhile measure for those who have managed to record CCTV footage of break-ins, vandalism and so on in the past, but without the proper detail necessary for that footage to be considered reliable evidence.