Story video Restyle lists presets only; edit by prompt with Sume

For photos, Instagram's Restyle in Stories lets you describe an edit; for videos, Meta's steps list only a preset effect. The announcement walks through a photo, including typing a prompt, and then a video, where the steps go from picking the clip to "select a preset effect" and Done. If you want to change a video with your own description, use a video-to-video model. Sume's Video Router has one: gemini-omni-flash-1.1 takes a video_url and a prompt that describes the edit.

What does Restyle do on a video in Stories?

Meta's page lists video presets such as underwater landscape, fire and flames, and snow. It says Restyle is free and available in the app, and that the Add Yours sticker lets friends apply the same edits. The page does not state a length limit or output size for the video, so I do not either.

What does Sume's edit mode need?

In the Video Router docs, video_to_video takes a video_url and a prompt that describes the edit. resolution is optional with a 720p default. There is no aspect_ratio and no duration. Native audio is always on, and generate_audio: false is rejected. video_url is the edit source, not a reference, so it cannot be combined with image_url, end_image_url or reference_*_urls.

What does a request look like?

This is the example from the docs, with a prompt that keeps everything except one object. Edit prompts work best when they say what to keep. The job is async; read the finished clip from the job result.

curl -X POST https://api.sume.com/v1/video-router/generate \
  -H "Authorization: Bearer $SUME_API_KEY" \
  -H "Content-Type: application/json" \
  -H "Idempotency-Key: video-router-edit-001" \
  -d '{
    "model": "gemini-omni-flash-1.1",
    "prompt": "Replace the bottle with an apple. Keep everything else the same.",
    "video_url": "https://example.com/clip.mp4",
    "resolution": "720p",
    "mode": "async"
  }'

When should I use which?

Use Instagram's Restyle when a preset gives you the look you want and you are posting straight to a Story. Use Sume when you need a specific change, such as swapping a product, and a file you can reuse on other platforms. Compare the output to the source before posting, and check that the camera move survived; pulling matching frames from both clips makes that easy. The edit mode has no duration field, so you cannot set the length in the request; cut long sources to the part you need first.

What does Meta suggest for photo prompts?

For photos, the announcement recommends including the subject, the lighting or mood, where in the frame the change goes, the style and the physical location, with examples like "add dramatic lighting" or "in the bottom left corner". The same habit helps in a video prompt: name what changes and say what stays. Keep each request to one change, then judge the result before you add a second.

Will the audio change?

Sume's docs say native audio is always on for this model and that you cannot turn it off, so check the sound of the edited clip, not only the picture. If you need your own audio, replace it afterwards in a Timeline render with an audio spine of your choice. Instagram's Restyle page does not mention audio for video, so I make no comparison there.