Cinematic 16:9 YouTube thumbnail. Extreme emotional close-up portrait of the main character from the reference image, face filled with intense dread and shock, eyes wide with sudden realization. Dramatic hard chiaroscuro lighting, cold blue fill and warm rim light. In his trembling hand close to his chest he grips a microcassette film reel. In the deep dark background, an ominous out-of-focus silhouette of a man in a trench coat watching. Bold massive graphic text in the upper third: 'THEY WERE LISTENING' in clean bold sans-serif distressed letters with subtle drop shadow. High visual contrast, crisp edge definition, optimized for mobile screens.
