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Video Extend takes an existing video clip and uses AI to generate a natural continuation, making it longer while preserving the original style, motion, and visual character. This is useful when a generated clip ends too soon, or when you want to add more time to footage before editing. Go to Tools > Video > Video Extend in the Artnex sidebar.

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How to extend a video

1

Upload your video

In the prompt bar at the bottom of the page, click the video upload area (the dashed rectangle on the left) and select a video file from your device. Accepted formats include MP4, MOV, and WebM.
The video uploader accepts any common video format. Once uploaded, a thumbnail preview appears in the upload area. Click the × button to remove it and start over.
2

Write a continuation prompt

In the text area, describe how the video should continue. Be specific about the action, camera movement, or any changes you want in the extended portion. For example: “The character continues walking forward as the camera follows from behind.”
3

Choose a quality tier

Use the model selector in the control bar to choose between:
  • Fast — outputs at 720p or 1080p, faster processing
  • Standard — outputs at 480p or 720p, slower but available for different use cases
Fast is recommended for most workflows. Use Standard if you specifically need 480p output or encounter issues with Fast mode.
4

Set the resolution

Use the resolution dropdown to choose your output resolution. Available options depend on the selected quality tier:
The credit cost displayed in the interface reflects the selected model. The cost is shown in the control bar next to the Extend button before you confirm.
5

Adjust advanced settings (optional)

Click Settings to access additional controls:
  • Duration — set the length of the extension from 4 to 12 seconds (slider)
  • Generate Audio — enable AI-generated audio for the extended portion
  • Camera Fixed — lock the camera position to reduce unwanted movement
  • Seed — enter a seed value to reproduce the same result across multiple runs
6

Extend the video

Click Extend to start generation. Processing time varies based on the length and resolution you selected.
7

Download the extended video

When generation is complete, the extended video appears in your My Creations gallery. Click the Download icon to save it.

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Credit costs

Credits are deducted only after a successful generation. If the extension fails, no credits are charged.