Found by @CrayonRosary@lemmy.world: it originates here: Dune by Alejandro Jodorowsky - Teaser Trailer (1976)
Source: used as B-roll in the intro of this video: https://www.youtube.com/watch?v=f8AJk2Sns_k&t=3
Here are individual frames but image search (SauceNAO, Google Lens, IQDB, Yandex) has not been helpful.
Frames
Transcript: Close-up shot of a woman’s face with a neutral expression, short brown '80s hair, lipstick, thick sharp eyeliner and glowing aqua irises. Widescreen with a higher-than-usual amount of film artifacts.
This is AI
You’re right. Later in the video, this shot with the same fake film effect appears and that’s indubitably AI (look at bottom right):
The video narration implied this is footage from a rare or unfinished film, though.
The transcript even reads like a prompt.