Sundip was going to get a RING doorbell but then heard about their privacy issues. Leo says that Amazon bought RING and has addressed the issues. So RING is pretty good right now. But Google NEST also makes a doorbell, so if you'd prefer an alternative, the NEST is a good option.
Naomi has a Ring doorbell and wants to know if she can back up the video and images to her NAS. By the time she gets the notification from it, the person who rang the doorbell is already gone. Leo says she could Live View it. Leo suspects that Naomi may have a bandwidth issue with her ISP. Ring goes to the Ring servers before contacting her, so there's probably latency in her network due to being in a rural area. Leo says a motion sensor camera could ping her faster than Ring.
(Disclaimer: Ring is a sponsor)