Mike Goril, Gadget Hacks:

In iOS 13, Apple added an important new feature to its HomeKit smart home ecosystem called HomeKit Secure Video. With it, you have a secure, private way to store and access recordings from your smart home IoT cameras.

And:

Now that we have HomeKit Secure Video, supported cameras can offer private and encrypted videos available in the cloud, viewable right from the Home app on your iPhone. You will also get object detection, with all analysis of videos performed locally on a HomeKit hub such as an iPad, and activity notifications — all without uploading any video to someone’s server.

And:

If you would like to store recordings in the cloud, you’ll also need an iCloud storage plan. The 200 GB plan is needed to store recordings from one camera, and the 2 TB plan will support up to five cameras. Recordings don’t count against your storage allotment and are saved for ten days. If you just want to stream the video, however, no plan is needed.

That last bit is important, recordings don’t count against your storage allotment.

I am in the market for a video doorbell but have been put off by the stories I’ve read about Ring/Amazon and privacy. This seems a solid path. Certainly, the article is worth reading. Lots of detail.