If you're up for a bit of DIY, you can do it with a raspberry pi + something like Motion:
https://github.com/Motion-Project/motion
I've looked for cameras that are easier to use and I can trust, and didn't really find anything. You're getting spied on by creepy tech bros in a startup that sells your video to the cops, or a random Chinese company that does who knows what with it, take your pick. Also maybe the whole world if you end up on shodan because the S in "IoT" stands for security.