Why can I play the archived ad but cannot make the new longer cutdown?

Work through the cause

1. List planned changes such as a longer opening, alternative product hold or revised transition. Identify the source ranges those changes could need.
2. Review archive settings against that scope and retain originals while preparing the package. Do not infer available source duration from the current timeline.
3. Open the collected copy and test the agreed changes on a duplicate sequence. Record what remains outside the handoff.

A concrete case (illustrative)

Illustrative case: the delivered five-second edit plays correctly, but the marketer asks to hold its opening longer. The trimmed archive contains no additional source frames, although the original camera or generated clip did.

Acceptance and next action

Pass when the package supports the agreed revision scope or clearly states its limits. This is archive planning, distinct from a transition freezing during the original edit. Do not promise that missing frames can be recovered without the source.

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Source scope: the linked documentation explains relevant tool behavior or technical context. The merchant scenario, review choices and acceptance condition are Itemlume editorial guidance; citation does not imply endorsement.