interesting way that QF2 did NOT declare a fuel emergency, just a laconic statement to say we've got no gas to go anywhere else, so we're just gunna autoland.
I can quite clearly hear her say "declaring a fuel emergency".
According to the regs, a Fuel Emergency only requires a Mayday if the predicted fuel upon landing at the nearest aerodrome is less than fixed reserve (I'm looking it up, I don't pretend to know everything that is in there).
Maybe a Pan would have been appropriate?