Huh, I saw this comment 5 days ago, and noted the name "westinghouse". Today I was researching an "ACME.eu" "cloud" camera, discovered it contacts ubia.cn, which is specified in a listing on the FCC website by Southern Telecom for a "Sharper Image" camera that is my exact model just with a different brand name.

Apparently, Southern Telecom has bought some American brands and sells spyware "cloud" devices to end-users.

You can see the list here: https://southerntelecom.com/brands/

I still haven't found a way how to watch the camera stream without the app. It's possible, but it's a UDP protocol that I do not understand. It works with or without Internet, so I'm sure I could watch it without giving it Internet access...