This one (https://web.archive.org/web/20231204210803/https://m.media-a...) shows hooks in what looks like a mudroom catching an image of a person in black clothing in a ski-mask, indicating a use case of the hook would be to surreptitiously record a thief.
On the archive, it is advertised as a "Hidden Clothes Hook Camera, Mini Spy Camera HD 1080P, Nanny Cam with Motion Detection, Wireless Security Camera for Home/Office/Pet Monitor, Video Recorder No WiFi Needed, No Audio" with no mention of it being a "bathroom spycam."