# Change an existing clip with Modify Video

> Use the Nodespell Modify Video Creative Tool to edit, restyle or transform an existing video clip with a written instruction and optional references.

Source: https://docs.nodespell.com/creative-tools/modify-video/ · Last updated: 2026-11-10

Modify Video is the Nodespell Creative Tool for changing a video you already have. You supply a source clip and an instruction—change the lighting, swap an object, restyle the shot—and the selected model returns a new video based on the original. Some models also accept reference images or audio.

## When to use Modify Video

| You want to…                                               | Use                                                                   |
| ---------------------------------------------------------- | --------------------------------------------------------------------- |
| Change what is in a clip, or how it looks                  | **Modify Video**                                                      |
| Add footage before or after a clip                         | [Extend Video](https://docs.nodespell.com/creative-tools/extend-video/)                         |
| Make a clip sharper or larger without changing its content | [Video Upscaler](https://docs.nodespell.com/creative-tools/video-upscaler/)                     |
| Make a person in a clip speak new audio                    | [Speak](https://docs.nodespell.com/creative-tools/speak/)                                       |
| Trim, cut or arrange clips                                 | [Timeline](https://docs.nodespell.com/edit/timeline/) and [Video editing](https://docs.nodespell.com/edit/video-editing/) |

Modify Video does not list models whose job is extending a clip; those are in Extend Video.

## Modify a video

1. Switch the workspace to **Create**. Select **Image to Video** in the tool rail, open the tool switcher at the top of the form, and choose **Modify Video**. It is also under **All tools**.
2. Check the model. The default is **Gemini Omni Flash Edit**.
3. Add the source clip to the video field. Select it to open **Choose assets** and pick an Asset or upload a file.
4. Write the instruction. Name the change directly, for example "make it night, keep everything else the same".
5. Add reference images, keyframes or audio if the model offers them.
6. Set **Generations** from 1 to 4.
7. Select **Modify**.

The primary button reads **Modify** in this tool, not **Generate**.

## Modify Video controls

| Control                             | What it does                                        | Options and defaults            |
| ----------------------------------- | --------------------------------------------------- | ------------------------------- |
| Tool switcher (title)               | Moves to another video Creative Tool                | All video tools                 |
| Model picker                        | Chooses the model                                   | Default: Gemini Omni Flash Edit |
| **Previous model** / **Next model** | Steps through eligible models                       | —                               |
| Source video field                  | The clip to change; always required in this tool    | One video                       |
| **More settings**                   | Less-used model settings                            | Collapsed                       |
| **Generations**                     | Number of runs submitted together                   | 1 to 4, default 1               |
| **Modify**                          | Adds or updates the model node and submits the runs | Shows the credit estimate       |

The source field is labelled **Source video** on models with curated Create labels, and **Video** or **Source Video** on others.

## Recommended models for Modify Video

The **Featured** collection lists:

- Gemini Omni Flash Edit (default)
- Runway Aleph 2

**All models** includes other editing, restyling and motion models, for example Wan 3.0 Video Edit, Kling 4.0 Video Edit, Luma Ray 3.2 Video To Video and Kling V3 Motion Control. See [Choose a model](https://docs.nodespell.com/creative-tools/choose-a-model/).

## What changes with the model?

Modify Video covers several kinds of change, and each model handles a different mix:

| Model                   | What it adds to the form                                                                                             |
| ----------------------- | -------------------------------------------------------------------------------------------------------------------- |
| Gemini Omni Flash Edit  | Source video and an instruction only                                                                                 |
| Runway Aleph 2          | Up to 5 optional keyframe images, with **Keyframe Positions** (`first`, `last`, or a time in seconds) and a **Seed** |
| Wan 3.0 Video Edit      | Reference images, reference audio, duration, resolution and **Generate audio**                                       |
| Kling V3 Motion Control | A required image and a required video, to drive the image with the clip's motion                                     |

- **Clip length:** limits come from the model. Runway Aleph 2, for example, accepts source videos between 2 and 30 seconds.
- **Prompting:** the Gemini Omni Flash Edit description recommends short, single-change instructions and adding "Keep everything else the same". Do complex changes as separate passes.
- **Voice:** the Gemini Omni Flash Edit description notes that voice editing is not supported. For new speech on a face, use [Speak](https://docs.nodespell.com/creative-tools/speak/).

Longer and higher-resolution clips usually cost more; check the estimate on **Modify** and see [Plans and credits](https://docs.nodespell.com/account/plans-and-credits/).

## Where does the modified video go?

**Modify** places the model node in the current graph level and runs it. Results appear in **Results** in the Create form and on the node; see [Takes](https://docs.nodespell.com/graph/takes/). The source clip is not changed. Generated media also appears under **Generated** in the [Asset Manager](https://docs.nodespell.com/assets/asset-manager/).

## Common problems

- **"This value is required."** The source video or the instruction is missing.
- **"Open Graph to edit this media input."** This media input cannot be edited in Create. Use **Open unrestricted Graph editing** and edit the node in Graph.
- **The model rejects the clip.** The source is outside the model's length, size or format limits. Read the model's input description, trim the clip in the [Timeline](https://docs.nodespell.com/edit/timeline/), and try again.
- **Uploaded-video editing is unavailable.** The Gemini Omni Flash Edit description notes that this depends on regional policy. Try another model.

## Frequently asked questions

### Does Modify Video overwrite my original clip?

No. Modify Video creates a new result on its own node. The source Asset or node output stays as it was.

### Can Modify Video make a clip longer?

No. Use [Extend Video](https://docs.nodespell.com/creative-tools/extend-video/), which lists models built to add footage before or after a clip.

### What is the default Modify Video model?

The default is Gemini Omni Flash Edit. It takes a source video and a short natural-language instruction.

### Why did my old Modify Video draft open in Extend Video?

Drafts and canvas cards that used an extension model now open in Extend Video, because extension moved into its own Creative Tool. Your settings are kept.

## Related

- [Extend Video](https://docs.nodespell.com/creative-tools/extend-video/) — add footage to a clip
- [Video Upscaler](https://docs.nodespell.com/creative-tools/video-upscaler/) — raise resolution without changing content
- [Choose a model](https://docs.nodespell.com/creative-tools/choose-a-model/) — compare editing models
- [Video editing](https://docs.nodespell.com/edit/video-editing/) — trim and arrange clips without AI
- [Revise without starting over](https://docs.nodespell.com/recipes/revise-without-starting-over/) — iterate on a result