I'm wondering if there is a TVtropes page for this. (talk amongst yourselves while I go and look at TV Tropes) There is one for the Droste Effect, a picture which contains itself and mise en abyme is mentioned but I can't find a specific page -- it would help if we had come up with a definitive term however.

I started wondering about TV Tropes because I was thinking about "Extras", which is so recursive it makes my head hurt.