security home alarm
Credit: Tom's GuideToday's best Nest Hello deals?$173. 88ViewRecommended RetailerReduced Price$229$189View$229View$287. 49ViewShow More DealsWe check over 130 million products every day for the best pricesHow Does A Video Doorbell Work?A video doorbell’s operation is probably not going to come as a huge surprise. Essentially, at its most basic level, the video doorbell works like this: There is a camera in the doorbell. When the camera senses movement around the doorbell or the actual ringing of the doorbell, it sends a live video feed to your smart phone. You can see this feed and determine whether or not you want to open the door.