[TOMT][youtube video] Two comedians sitting in casting chairs having a candid conversation, except the entire conversation is on the script they're holding

It looks like they're on set of Lord of the Rings or something in NZ, at one part, they zoom in on the script and it says something like "cut to a shot of the script, it says: cut to a shot of the script, it says: ..." etc. for an entire page. I think it's from a UK comedy show as well, based on their accents.