Gemini Omni 1.2 Flash Edit edits an existing video (up to 15 s) from a text instruction: time of day, season, weather, materials, setting or art style. Look changes such as lighting, season or color keep motion and timing almost exactly; setting swaps keep the action but can shift motion; a full watercolor restyle changed the motion and regenerated the audio. Optional 1 to 10 reference images insert a specific subject or product. Output length matches the source. 360p to 4K. To add footage use Extend; to raise resolution use Upscale.