In this video, Povs Adventures uses an action cam to film water filling an ice cube maker inside a fridge and slowly, inexorably forming ice.
Normally it would be pitch dark in there, but he cunningly concealed a flashlight alonsgside the action cam, itself magnetically attached to the interior of the appliance.
On the subject: I recently had to deal with a blocked drain, and learned that the cheap boroscopes you can get that attach to phones or little LCD screens are basically useless. You need the expensive brand-name stuff with more rigid lines and more powerful lights.
