What ByteDance announced
ByteDance launched Seedance 2.5 on July 31, 2026 and highlights up to 30-second audio-video generation, flexible multimodal referencing, editing, and multi-round extension.
Direct the sequence
Plan a beginning, change, and resolved end. Mark important beats in time, assign references clearly, and use extensions only after the first segment passes continuity review.
Approval checks
Longer clips create more opportunities for drift. Inspect identity, spatial logic, dialogue, ambience, cuts, and the join between extensions; confirm live access and terms before committing a campaign.
OFFICIAL SOURCE
Verify availability, pricing, limits, and terms in the live interface.
Official ByteDance Seedance 2.5 announcement ↗