AI music-video generators: align the edit with the soundtrack
Evidence date: 2026-10-07

Decision criteria
Current model allowance, clip cost, rights and final export.

Editorial evaluation scenario
Fictional original soundtrack is 32 seconds; the plan contains six shots of six seconds each.
List every shot duration and add them before production. Watch cuts in the assembled sequence; a collection of usable clips can still miss the song’s intended timing.
Current model allowance, clip cost, rights and final export.

Input / draft / final edit
Fictional original soundtrack is 32 seconds; the plan contains six shots of six seconds each.
Six six-second clips fit the 32-second track exactly.
The initial plan totals 36 seconds. Use four six-second shots plus two four-second shots: 24+8=32 seconds.

Before buying
Runway Help
Documented: Runway documents trimming and assembling clips in Studio.
Check: Current model allowance, clip cost, rights and final export.
Manual or conventional route
Documented: Use a conventional video editor when you have the footage and mainly need timing and transitions.
Check: Editorial workflow advice; this is not a measured comparison or vendor performance claim.

Official sources
https://help.runwayml.com/hc/en-us/articles/52685547867667-Trimming-and-Assembling-Clips-in-Studio

Record your own test: selected plan, date, input, output, corrections, export and total cost. This sheet does not claim a vendor test.