Start with the moments that tell the story
Bring clips of the same subject under different lighting and a neutral reference if available. Pick the takes that make the subject clear, including a strong opening and a complete ending. These choices give Shorty a useful starting point for the edit.
Give Shorty the creative direction
Request consistent brightness, contrast and color across adjacent shots.
Try a 20-second 9:16 edit as a starting point. Include the exact title or closing message you want on screen. Add a reference when you want to show the pace, captions or mood.
Try this editing prompt
Create a 20-second 9:16 video from my clips of the same subject under different lighting and a neutral reference if available. Request consistent brightness, contrast and color across adjacent shots. Use my supplied wording for titles. Check skin tones and real product colors and avoid treating a darker clip as evidence of a different material.
Make the next version more specific
Check skin tones and real product colors and avoid treating a darker clip as evidence of a different material.
Play the first cut and pick the change that would help the story most. Name the moment, describe the result you want and tell Shorty what to keep. A note such as “hold the final product shot longer” gives the revision a clear direction.