Start with the moments that tell the story
Bring the original clip, target canvas and requested background color. 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
Keep the full source visible inside a deliberate border or background layout.
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 the original clip, target canvas and requested background color. Keep the full source visible inside a deliberate border or background layout. Use my supplied wording for titles. Check that the border does not make the subject too small to understand.
Make the next version more specific
Check that the border does not make the subject too small to understand.
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.