"극장에서 영화를 찍읍시다."
Translation:Let's film a movie at the theater.
JOSHUAJAMES694219 et al. It is not so obsurd as you think. The stairway scene in the classic movie, "Gone With the Wind" was filmed on the staircase leading to the balcony of the Byrd Theatre in Richmond, Virginia, USA! This movie palace was built in 1928 and still shows movies, including "Gone With the Wind" . https://byrdtheatre.org
Semantically speaking both terms are identical, and honestly both sentences feel to me, a native English speaker, like they're implying the film being shot is set in a cinema and that is why we're filming a movie in a theater. Of course, like a lot of language, it's all about context.