EDIT BRIEF — three opening treatments, one fixed continuation.
Use one approved 15-second base ad. Generate only three short opening clips using the same authorized creator/product/voice reference. A: hesitation at the laptop, "Stuck before you start?" B: direct-to-camera close-up, "What's your first move?" C: earcup detail and one natural adjustment, "Watch this desk reset."
Generate four seconds per clip in Seedance 2 Fast, then use only 0.000–3.000 seconds after checking that the line finishes. Camera, action, opening voice and matching caption form ONE bundled opening-treatment variable. This cannot isolate which individual element caused any eventual effect.
Keep seconds 3.000–15.000, creator identity, product, location, wardrobe, light, body copy, CTA and destination fixed. Reuse the same encoded continuation and the same 12-second source audio file; do not regenerate them. Match perceived voice and loudness, but inspect actual voice continuity rather than claiming exact voice cloning.
Close at 12.000–15.000 with the same CTA: "See the headphones". Export at 720 × 1280, 24 fps, H.264, AAC stereo, 48 kHz, 15.000 seconds. Inspect the cut at 3 seconds, lips, fingers, product and sound. Full audio tracks differ because opening speech differs. Record all attempts and real provider charges. This fictional editorial concept is not a customer testimonial or measured headphone-performance claim.