Korean YouTube thumbnail, split-screen, high contrast. Left half: the same young Korean man from the reference photo (same face, ash-brown wolf-cut hair, silver earring, black hoodie) at his RGB gaming desk typing one line on a keyboard, a glowing chat bubble above the keyboard with a short line of text shown as abstract glowing dashes. A big glowing coral arrow points to the right half. Right half: a breathtaking underwater shot of a beautiful mermaid with a shimmering tail gripping a terrified castaway man and pulling him down into dark blue depths, sunbeams from above. Huge bold Korean headline across the top, exactly: "한 줄 쳤더니 이게 나옴". Yellow subtitle bottom-right, exactly: "1,800만 뷰 영화 재현". Correct Korean spelling is critical. No other text, no logos.
