Most CCTV cameras are private and not monitored. You install them and have them record on a loop - old data is automatically erased to make room for new data. W

Most CCTV cameras are private and not monitored. You install them and have them record on a loop - old data is automatically erased to make room for new data. When something bad happens (an accident, a robbery, etc) recording is stopped and the existing data is handed over to relevant parties. This is far less problematic than an omnipresent, monitored, shared, catalogued and indexed in perpetuity, video system.