IFTTT trigger on "no motion detected for X"

Maybe you could mount the camera outside, under an eave or something. They’re not technically outdoor-rated, but people seem to have decent luck using them outdoors as long as they’re not directly getting rained on. You’d need to test to determine whether the connection to the motion sensor is strong enough when it’s outdoors, though. But you wouldn’t have the same privacy issues as putting it inside.