Step 1: upload a portrait picture.

Step 2: Describe the video you want to generate, for example what actions the person performs, the camera movement path, and any background changes.

Example:

Under the midday sun, ripples shimmered across the surface of an outdoor pool. Suddenly a blonde woman in a red bikini rose out of the water; her large breasts trembled as she surfaced. Once she steadied herself, the water barely covered her navel. She was soaked, droplets of water sparkling on her hair and skin. Then she lifted both hands from under the water along the sides of her body up to above her head, and slowly stroked down her wet golden hair. Her breasts were large and swayed with her movements. She smiled at the camera, showing her white teeth. In the background, several white-haired Indian men were swimming toward her.