If you make a purchase by clicking one of our links, we may earn a small share of the revenue. Our picks and opinions are independent from USA TODAY's newsroom and any business incentives. Over the past few years, security cameras have come a long way from their direct-to-VHS origins. Today's security cameras are smarter, using motion detection to tell when something unusual is happening and WiFi connections to send you phone alerts. Many also back up clips to the cloud, so even if a thief steals your camera, you still have the evidence you need.