What is the figure of speech of "something being recorded on a potato", referring to video of low quality, derived from?

My first thought was that it must derive from the same source as “small potatoes”, i.e. referring to something of low value (because it is a cheap staple food).

Wiktionary supports this theory (see definition #3): https://en.wiktionary.org/wiki/potato

I’ve also heard “recorded on a toaster”, but that’s probably from the fact that a toaster is an electronic device, but much lower tech than a phone or camera.