Video doorbells enable the user to see who is at their door on their smart screens or mobile devices. A recent study indicates that 10% of US households with high-speed internet surveyed owned one of these devices in the second quarter of 2020, compared to 7% in 2017. This increased popularity has driven doorbell OEMs to improve innovation and integration with other smart things over the years.
https://www.notebookcheck.net/61-of-US-households-with-smart-home-devices-polled-plan-to-buy-a-smart-doorbell-in-the-next-12-months.501481.0.html