Happy Horse creates cinematic video from a text prompt or a first-frame image. Use it for text-to-video exploration, product shots, game scenes, ads, social clips, and image-led animation. It supports 720P or 1080P output, 3 to 15 second duration, multiple aspect ratios, native audio, and seed control. First-frame mode keeps the opening image as the visual anchor while adding motion, camera movement, ambience, and scene continuity.