A big exception to the rule are the HomeKit secure video cameras that work in Apple’s ecosystem. If your HomeKit compatible camera is going straight into HKSV, and isn’t paired with manufacturer’s own cloud video service, then it’s all E2EE and it can’t be accessed by Apple, even with a warrant. Problem is, camera offerings are limited, and scrolling clips in HomeKit is paaaainful. Also, if you’re not in Apple’s ecosystem, you can’t use it.