Given the information available up to my last update in April 2023, here are a few possibilities:

The video is set within a "Backrooms" environment—a popular creepypasta aesthetic characterized by endless, empty office spaces with yellow wallpaper, damp carpets, and buzzing fluorescent lights.

Professional studios, rented casting spaces, or official corporate offices.

: When thousands of users type partial phrases looking for a recent update, search engines heavily auto-complete phrases like "mira backroom casting upd," cementing it as a high-volume keyword phrase. Data Overview: Content Lifecycle