One 30-second AI clip or six short shots? A practical way to decide

Choose one 30-second generation when the ad is one continuous scene, and choose six short shots joined in Timeline when it has distinct beats. The deciding factor is what a retry costs: with one long clip, a flaw in second 22 means re-buying all 30 seconds, while with six shots you redo one.

Sume lists models that accept up to 30 seconds, such as seedance-2.5, and a Timeline 1.0 render that joins clips for $0.10 per output minute rounded up (Sume docs, read 2026-10-02). The comparison below is about workflow, not output quality.

How do the two approaches compare?

The right column assumes each shot is around five seconds. Cost depends on the model and resolution, so read pricing_skus from the catalog before you budget.

When does one long clip win?

Choose it for a single camera move, a continuous product demo, or a slow reveal where a cut would break the effect. A prompt that describes one unbroken shot suits it.

When do shots win?

Choose shots for an ad with a hook, a demo and a call to action, or any brief where the client may ask to change one beat. You can also reuse accepted shots across versions and render several cuts for different placements.

How does concurrency affect the choice?

Sume's plans cap processing jobs: Free 1, Pro 4, Startup 8, Scale 20, per the generation admission docs. Extra valid jobs queue rather than fail. Six shots on a Pro plan run four at a time; a single long clip is one job and one wait.