Movies within movies by Egantx7

Question 7

The very real Eli Roth directed this fictional film (under the pseudonym Alois von Eichberg). This film stars the fictional Frederic Zoller who was played by the real Daniel Brühl. Zoller becomes smitten with a cinema owner named Shoshana, and Zoller arranges for this film to premiere at Shoshana's cinema, allowing her to splice in a few seconds of her claiming revenge before torching the building with most of the Third Reich's leadership inside. Identify this film which was integral to the plot of Quentin Tarantino's Inglorious Basterds.

Stolz der Nation (Nation's Pride)