The other day I was doing a task I wished to record my view from in case I needed to review later and searched for webcam glasses or something. There are tons of $50 fairly unobtrusive spy glasses on Amazon already.

Actually, this reminds me I might buy a pair after all. In my case I was reviewing an important document package and wanted a way to quickly confirm later what I put in. But I've also recorded unboxings (when worried about a potential return) and disassembly of appliances for repairs that I only make every year or two.