Dan would like to get a doorbell that can not only notify his parents with video when someone is at the door, but can also unlock the door remotely. Rich says there are products that do one or the other, but not a lot that can do both. Ring is a great video doorbell, and he can view it remotely on a mobile device. Nest IQ has face detection, and could unlock the door. But he really doesn't want something fully automated.
Leo has had the Nest IQ camera for review this past week. It's an indoor 4K camera, but it doesn't necessarily stream 4K over the network. Because it has such a high resolution camera, it can zoom and pan, and also has face recognition. It can see a person coming to the house and identify whether or not it's someone familiar or a stranger. It's an expensive camera, but because it's a Google company, Nest cameras are among the most secure cameras on the market.