I am intrigued with the possibility of recording change on video and an attachment to a GoPro 4 seems like just the ticket. GoPro cameras are small,waterproof, but have a fixed 16 mm (35 mm equivalent) lens. They are also limited by a 2 hour battery life. The Blink intervalometer shuts the camera down when not exposing and image thereby significantly increasing the battery life. If you have a GoPro and want to play with this possibility check out: Blink Intervalometer
Technical: Recorded over two days for a total of 18 hours. Images recorded at 1 minute intervals, 16 second video from 18 hours of change.