I'm curious if you've considered targeting small business at all, that maybe had enough flexibility that consumers could adopt. I'm a board member of my condo corporation (HOA), and our staff can struggle quite alot with scrubbing through security camera footage to find events, mainly damage to the property. So having a system that can say load all the video of a vehicle passing through a garage door for the past two days would save a ton of time. Of the feature you've described, on when something goes missing or damage appears to the build would save lots of time.
Similar to alot of the sentiment in this post, because its monitoring of public spaces, I likely wouldn't accept a cloud based solution. It's just difficult to vet that companies are doing the right things and have a good security posture, despite privacy policies. Simple cloud storage like an S3 bucket would probably be fine.
Anyways, best of luck on the launch.