They’re using the 1975 third draft in the auditions, but Luke’s lines were actually written for Ben Kenobi.
In the 1974 rough draft Princess Leia Aquilae’s home planet was also named Aquilae, but in the 1975 third draft she’s Leia Organa from Organa Major. (In the second draft Leia mostly drops out except as a bit character.) Alderaan was the name of an Imperial planet with a floating cloud city until the 1976 fourth draft, when the cloud city dropped out of the script, and the name was recycled for Leia’s homeworld.
Luke’s homeworld is Utapau in the 1975 second and third drafts – or rather, its colloquial name is Utapau, but it’s officially known as Sullust, like Arrakis/Dune in Frank Herbert’s novels. The 1976 fourth draft changed the name to Tatooine, based on the actual location of Tataouine in Tunisia. (The hero in the 1974 rough draft is Annikin Starkiller, who is also from Aquilae.)
The mention of Aquilae in the clip above is mostly an offhand reuse of an old name. Like Sullust/Utapau/Tatooine, Aquilae in the 1974 rough draft is a desert planet.