Add a missing prop without another take
Keep the recorded action and framing while creating one described object inside the selected moment.
Object Addition
Add an Object to a Video with AI
Insert one new visible object into footage you already have. Select the moment, describe the object and its placement, and name the people, motion, lighting, and scene details you want the model to keep.
Use object addition when a new item should appear where there was no target object. Use replacement when one existing object should become another, or removal when an object should disappear.
1new object per edit
Videoexisting footage as input
Previewreview before export
Why use OneThing Video
Change one thing. Keep the shot you already like.
Control where the object appears
Describe the intended position, size, material, lighting response, and nearby surfaces in the prompt.
Keep the request distinct from replacement
Use this workflow only when a new item should appear, rather than transforming or removing an existing object.
How it works
From upload to preview in four focused steps.
Insert one described item into an area where no target object currently exists.
Specify its position, scale, color, material, and relationship to nearby surfaces.
Review object stability, contact, shadows, and occlusion before accepting the edit.
Upload the clip
Start with footage you own or are authorized to edit.
Select the moment
Use the timeline range to keep the edit focused.
Prompt the change
Describe what changes and what stays unchanged.
Preview the result
Compare the edited range before accepting the render.
Use cases
Where Object Addition saves time.
Creator set details
Add a small prop or decoration to an uncluttered part of your own recorded scene.
Tabletop concepts
Preview one described item on an empty table, counter, shelf, or product set.
Story accents
Introduce a simple visual object that supports the action without asking the model to rebuild the scene.
Prompt examples
Say what should change—and what should stay the same.
PropTabletop itemSet detailForeground objectBackground object
Add a small ceramic vase to the empty right side of the table. Keep the person, lighting, and camera movement unchanged.
Place a closed red notebook on the empty desk. Match the desk perspective and keep the hands and room unchanged.
Add a small green plant to the empty shelf. Preserve the wall, shadows, framing, and original motion.
Edit responsibly. Keep the person and story authentic.
Upload only footage you own or have permission to edit. OneThing Video is made for precise visual changes, not identity swaps, impersonation, or watermark removal.
Describe one clear change and name the details that should remain untouched for a more controlled result.
FAQ
What to know before uploading your clip.
How do I add an object to an existing video?
Upload your video, select the range, and describe one new object together with its position, size, material, and the scene details the model should preserve.
What is the difference between adding and replacing an object?
Addition creates a new item where there was no target object. Replacement turns one visible object into another, while removal makes an object disappear.
Will the added object look consistent through the whole range?
Results vary with motion, perspective, contact, shadows, reflections, and occlusion. Review the generated clip carefully. Use only footage you own or are authorized to edit, and disclose material synthetic additions when the context requires it.
OneThing Video
Add one object to the shot you already have.
Select the moment and describe the new object, its placement, and the surrounding details to preserve.