How to write:
• Reference the video: @Video1
• Reference images: @Image1, @Image2, ...
• Say what to change (winter / night / remove object).

Example:
Use @Video1 as base. Make it winter like @Image1. Keep camera & motion unchanged.

Video constraints:
• Aspect ratio: 16:9 or 9:16
• Duration: 3–12 seconds
• MP4 only

Reference images guide style / season / environment.
They don’t replace motion (video keeps motion).

This selector affects credits / timer UI only.
Kling uses the uploaded video length.

If enabled, the output keeps the original audio track (when supported).