Vertical
9:16 AI video from a photo
The phone shape is a control on the desk, not a different model.
Choose 9:16 next to the length and the resolution. 16:9 and 1:1 are the other two. The credit price does not change with the shape. It changes with the model, the seconds, the resolution, and audio.
Use 9:16 when the clip is going to a phone feed. The effect you picked does not switch just because the frame is tall.