Alot of times things arent halachily assur, but “frumkite” assur
Movies are halachicly assur. Even if there is “only” one scene of one woman dressed totally tznius except that her shirt-sleeve only reaches just above her elbow. Considering (other than animated only films) that out of over 250,000 made I doubt there are even a handful that meet that criteria. And the vast vast vast majority are far far far worse.