ByteDance previews Seedance 2.5 with native 30-second 4K clips.

At Volcano Engine FORCE on June 23, ByteDance previewed Seedance 2.5, claiming a single native 30-second clip without stitching, up to 50 reference inputs in one generation, and region-level editing that redraws part of a frame (The Next Web). Enterprise beta now, public launch targeted early July. If the 30-second native-generation claim holds up, it pressures Runway, Sora, and Veo on the one thing they all still struggle with: long-form coherence without visible seams.