Here is another simple tool that lets you record video covertly around your property. The Xtreme Life Plus Bucket has a hidden camera with WiFi. It also has one year of standby battery life. It can run for 28 hours continuously. It detects motion to record video when something happens.
The Xtreme Life Plus Bucket is water resistant. It is capable of recording 1080p video in low light conditions. Not cheap though.