Seedance 2.5 Is Now Live on Yihook: From Generating Clips to Creating Complete Videos

Seedance 2.5 is ByteDance’s next-generation audio-video generation model. Building on the unified multimodal architecture of Seedance 2.0, it moves AI video beyond isolated clips and toward a more complete production workflow, with stronger long-form storytelling, multimodal referencing, and controllable editing.

The upgrade focuses on four key capabilities:

• Generate videos up to 30 seconds long in a single run;
• Extend an existing video with new content;
• Use a larger set of image, video, and audio references;
• Control timing with timestamps and make more precise, targeted edits.

Together, these capabilities help ads, branded content, and narrative videos maintain consistent characters, environments, actions, sound, and pacing over longer sequences—reducing the need for manual stitching and repeated revisions.

1. Generate Up to 30 Seconds in a Single Run

Seedance 2.5 increases the maximum duration of a single generated video to 30 seconds.

That is enough time to build a complete short-form structure:

• Use the first three seconds to create tension or capture attention;
• Spend the next 15–20 seconds developing the scene, product benefits, or story;
• Use the final seconds for a memorable brand cue and call to action.

Compared with generating and stitching together multiple short clips, a longer single generation can reduce character drift, lighting changes, broken motion, and inconsistent environments.

It also gives the model enough room to organize several connected shots into a clear setup, progression, turn, and conclusion instead of simply extending one visual moment.

2. Video Extension Keeps the Story Moving

In addition to generating a 30-second video in one run, Seedance 2.5 can extend an existing result with new content.

Video extension does more than append random footage. The model references the previous clip’s subject identity, environment, motion state, visual style, sound, and narrative rhythm when generating what happens next.

This is useful when you need more room to:

• Complete an unfinished character action;
• Add a product result or closing scene to an ad;
• Continue the plot of a short-form drama;
• Expand a complete scene into a longer sequence;
• Add a brand message or call to action to an existing video.

For creators, extension reduces the work required to rebuild characters, environments, and visual styles. Connected segments can also maintain a more unified audiovisual language, creating new possibilities for videos that run for several minutes.

3. Up to 50 Reference Assets for More Precise Creative Control

For commercial video production, a single prompt is rarely enough.

Teams may need to provide product images, character designs, environment references, brand visuals, camera references, background music, and storyboards. The more complex the brief becomes, the more accurately the model must understand the purpose of each asset.

Seedance 2.5 can accept up to:

• 30 reference images;
• 10 reference videos;
• 10 reference audio clips.

Each asset can play a different role, covering characters, products, environments, actions, camera movement, pacing, sound, or visual style.

For example, a branded video can reference a product’s appearance, model styling, brand colors, shooting environment, camera movement, and musical rhythm at the same time. The result can follow a complete creative brief more closely instead of leaving the model to guess.

Seedance 2.5 also improves its use of 3D blockout, motion, and creative references. Creators can use a simple untextured 3D model to define spatial relationships, subject positions, motion paths, and camera placement before the model adds materials, lighting, and the final visual style.

4. Timestamp Control and Targeted Editing

Once AI video enters a real production workflow, editing often matters more than the first generation.

Brand teams regularly need to make changes such as:

• Introduce the product at the five-second mark;
• Turn a shot into a close-up;
• Replace the background or change a product color;
• Keep the character’s performance while changing only the camera movement;
• Revise a specific section of audio or story;
• Preserve the parts that work and regenerate only one section.

Seedance 2.5 supports timestamp-based control over the story, viewpoint, camera movement, and pacing of different time ranges. After generation, creators can also make targeted changes to characters, actions, sound, or story elements within a selected segment.

The model further improves green-screen editing, viewpoint and camera editing, and reference-based editing. Instead of regenerating an entire video for every change, creators can work in a way that more closely resembles a real video production process.

Before and After

Why Seedance 2.5 Works for Product and Marketing Videos

The value of Seedance 2.5 goes beyond improved visuals. It brings AI-generated video closer to content that teams can actually use.

Seedance 2.5 Is Now Live on Yihook

Seedance 2.5 is now available on Yihook. Creators, merchants, and marketing teams can start from the Creative Center, Viral Analysis, or Social Media Radar to move from idea to video generation and content testing faster—without starting from a blank prompt.

Prepare your assets, select Seedance 2.5, and generate your first video on Yihook today.