Still wondering if anyone knows of a unit that has sound detection, in other words sound triggers, to initiate the video recording.
Baby monitor cameras often have sound activation. Google Nest also has sound activation.
To the OP, I went with an Arlo system. We opted for obvious cameras, signs, and went wireless. The response time to my house for the police is too long to bother with a different type. With a wifi extender you can mount the cameras pretty much anywhere. We have 5 cameras and the doorbell. All on solar panels.
It's been a good system and has been in for 2 years. No contract if you don't want it, and you can monitor on your phone. Even talk through the doorbell or cameras. Fun when there are people there and the camera says hello.
Jeremy