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Dreamina Seedance 2.5: 30-Second 4K AI Video in a Single Clip — No Stitching Required

ByteDance's AI video platform Dreamina launched Seedance 2.5 on July 31, 2026. Generate 30-second 4K video in a single continuous clip, with Long Video Mode (beta) extending to 3 minutes. Up to 50 multimodal reference assets, consistent characters, scenes, and audio — here's why the workflow for advertising and content creation is changing at its core.