For peace of mind, you can use the security cam to view the delivery take place live remotely, or watch an automatic recording later.
The camera captures 1080p video and includes two way audio (mic and speakers) so you can talk to people at home through the app, and they can talk back to you. The associated cloud service uses computer vision to send intelligent alerts. For instance, the service can (theoretically, at least) differentiate between a human intruder and your pets setting off the motion sensor.