YouTube video thumbnail, 16:9, photorealistic, ultra sharp, high contrast, vivid saturated colors, cinematic lighting. The woman is exactly the person from the first reference image: same face, same dark wavy shoulder-length hair, dark knit sweater. The creature is exactly the glowing teal sea serpent from the second reference image. No text, no letters, no numbers, no logos, no watermarks. The third reference image is a film still. Composition: the woman in the foreground on the left, framed from the waist up, holding a smartphone up toward the camera; the phone screen clearly shows the film still from the third reference image. Behind her the serpent rises huge from dark water and looms over her shoulder, glowing. She has a confident, knowing smile. Keep the top-right area darker and uncluttered for a caption.
