How to Edit YouTube Shorts with AI: A Complete Guide

A forty-second video can take an afternoon to edit. You compare three versions of the opening, cut the waits between attempts, find the close-up that explains the action, and move a caption because it covers the very thing viewers came to see. Then you play it again with sound and discover that the music gives away the ending too early.

Today, an AI editing assistant can handle much of that repeated work. You still set the vision and direct the edit, but the assistant takes on most of the grunt. In invideo Editor, the built-in agent can review your recordings, make cuts, add graphics and adjust sound on a frame-accurate multitrack timeline. You can refine the result through further instructions or use the full professional editing suite to shape it manually, all in your browser.

In this guide, we’ll use invideo Editor to turn footage recorded for a paper-plane hoop challenge into a 35–45 second YouTube Short. The prompts and illustrations are a worked example you can adapt to your own recordings.

Upload your recordings and brief the AI assistant

Open invideo Editor, create a “Paper Plane Challenge” project and upload the recordings. For this example, the files are Presenter.mp4, Folding.mp4, Flights.mp4 and Reaction.mp4. If they are already in a project, open it and identify the timeline you want to develop. Include a script or shot list when you have one.

Once your recordings are uploaded, open the built-in assistant chat to brief the edit.

Start by telling the assistant what each recording contains and who the Short is for:

Illustration: the brief describes the four source recordings and intended audience before any hook or assembly instructions.

This gives the assistant the footage context before you ask it to choose takes and assemble the Short.

Define the hook and structure and assemble the cut

Give the built-in agent the structure you want, then let it find the recordings that make each part work. Here, the hook starts with the creator’s question. Showing the plane, hoop and distance next makes the challenge clear before viewers watch the attempt: will she make it?

Ask the agent to compare recorded takes, find the clearest view of the challenge and assemble the demonstration around that opening:

Build a first cut on “Paper Plane Short” using this structure: question, challenge, demonstration, reaction. Find the clearest energetic delivery of the opening question in Presenter.mp4. Follow it with footage showing the plane, hoop and distance between them, so viewers understand the challenge before the throw. Use a brief folding detail if it helps establish the homemade plane. Then show the recorded attempts leading to the successful throw and genuine reaction. Remove restarted lines and waits between attempts. Keep the successful throw continuous from release through the hoop, and do not reveal its outcome in the opening. Aim for 35–45 seconds. Use only our recordings and leave graphics and music for later.

Illustration: the agent chat shows the first-cut instruction beside a single monitor and a timeline containing the question, challenge, demonstration and reaction.

Play the opening through the first attempt. Can you understand the question, see why the challenge is difficult and follow the move into the demonstration? Check the agent’s selected takes in the source footage if a delivery or action feels wrong. You can ask for a more natural question take or a wider challenge shot without rebuilding the whole sequence.

The assembled clips stay editable. Choose an exact cut frame yourself, or let the question’s audio continue over the challenge shot when that makes the opening flow. The agent handles the search and assembly; you decide whether those choices build the anticipation you want.

Create two cuts and compare how anticipation builds

You may like the structure but still be unsure how quickly to move into the throw. Ask the agent to create two variations on separate timelines, keeping the same question → challenge → demonstration sequence and recorded payoff.

Make two variations of “Paper Plane Short” on separate timelines, leaving the current cut unchanged. Name them “Paper Plane Short Quick” and “Paper Plane Short Build.” In Quick, use a concise view of the challenge and move promptly into the demonstration. In Build, give the plane, hoop and distance more time to register, then keep a brief aiming beat before the throw. Use the same selected question delivery, attempts, complete successful flight and closing reaction in both. Adjust the setup and reset timing to create the difference; keep the actual flight at its recorded speed. Leave graphics and music for later.

Illustration: the Timelines list shows the original “Paper Plane Short” and its Quick and Build variations, with Build selected.

Watch both openings through the payoff. The quicker version may feel more immediate; the longer setup may make the attempt easier to anticipate. Compare whether the challenge is clear and the aiming beat adds tension, rather than choosing whichever cut is shortest.

Once you prefer a direction, give the agent specific feedback. For example:

Use Build’s opening and aiming beat on “Paper Plane Short,” but shorten the retrieval after the near miss. Move directly into the final setup while keeping the pause before release. Preserve the selected question, complete successful flight and genuine reaction. Keep both comparison timelines available.

Replay the revised passage and its joins. You can fine-tune the pause manually on the frame-accurate timeline, then continue with the agent from your choice. With the structure and pacing settled, develop the framing, text and sound on “Paper Plane Short”.

Reframe the Short for 9:16 without losing the action

Ask the agent to change the timeline to 9:16 and reframe each selected shot for the portrait canvas. Explain what must stay visible: the creator and plane during the question, the hoop and distance during the challenge, and the complete path of the successful throw during the demonstration.

Make “Paper Plane Short” 9:16 and reframe each selected shot to fill the vertical canvas without black bars. Keep the creator’s face, plane and relevant gestures visible during the opening question. Adjust position and scale for the challenge setup and throw so viewers can follow the release, flight and hoop. Check the framing throughout the movement. Preserve the original proportions, approved cut timing and recorded flight speed.

Watch the whole shot to check the vertical framing. The plane can leave a crop quickly, so review the release, flight and arrival at the hoop. Ask the agent to adjust the framing through the movement or choose a recorded take that keeps the action clear.

Illustration: the throw fills the vertical 9:16 monitor without black bars, with the creator, plane and hoop visible.

The same professional controls remain available manually. Refine position and scale, animate a close-up with keyframes, or choose a different composition. For this flight, a steady wide view is a creative choice: it lets the action do the work.

Add timed captions and graphics

Ask the agent to caption the spoken dialogue, using short phrases and a readable style. Specify where the captions should sit and which actions they must leave clear. Then give separate instructions for the opening question and “Final throw” label, including their wording, timing and animation, so you can refine those titles independently.

Caption the spoken dialogue on “Paper Plane Short” in short readable phrases. Check the wording against the audio and keep captions clear of her face, the plane, hoop and flight path. Add the opening title “Can it fly through?” and a separate “Final throw” label before the last attempt. Place that label in a clear area of the vertical frame and remove it after the result. Keep these as separate editable text layers. Use a restrained fade, and do not reveal the outcome in a caption before it happens.

Illustration: the creator’s face remains visible above the spoken captions in the vertical preview. The challenge title and captions appear as separate text clips above the footage.

Check the Short without sound at phone size. Read every phrase and keep the creator’s face visible as she explains the challenge. Check that captions and labels leave the plane and flight path clear throughout the action.

If the opening question stays on screen too long, make a narrow request:

End “Can it fly through?” before the demonstration begins. Keep its wording, font, colour and entrance animation. Leave dialogue captions and all picture cuts unchanged.

You can adjust the title’s duration, placement and animation manually too. invideo’s text and motion-graphics controls keep the treatment available for further creative changes.

Build sound toward the throw, then let the reaction land

Sound can support anticipation without announcing the success early. Ask the agent to start with the creator’s voice and original action sounds, then add the music and accents they need.

Balance the spoken lines on “Paper Plane Short” and smooth abrupt audio joins without clipping words or breaths. Keep useful paper rustle and the genuine closing reaction. Find a light, playful stock music bed and place it on a separate track. Lower the music during the final aim and flight so the original sound is clear. Place one subtle accent just after the plane passes through the hoop, never before it. Fade the music beneath the closing reaction. Keep the approved picture cuts, captions and titles unchanged. Use stock audio for this pass rather than generating new media.

Illustration: original audio stays on A1 while the music bed on A2 builds before the throw and lowers for the reaction. Timings are examples.

The agent can place effects against visible actions and reveals. Listen to the actual result: the right sound placed a few frames early can still spoil the payoff.

If it feels too celebratory, ask for a softer accent while preserving its position. If a music beat competes with the opening words, reduce that passage’s level. The audio workspace lets you shape levels, fades and effects yourself; you can also move an accent by a frame until it feels right.

Compare the folding and flight shots for exposure and colour. Ask the agent to match a noticeably warm or dark shot while keeping the white paper neutral, or refine it with the colour controls. A consistent image helps the separate recordings feel like one small story.

Review and export the finished Short

Play the complete timeline with picture, text and sound together. Does the question lead to the result? Can you see the full successful action? Do captions remain readable throughout the vertical edit? Listen through the near-miss join, the music drop and the ending.

Select “Paper Plane Short” and use Export to render the finished timeline as an H.264 MP4. Check the portrait dimensions and chosen resolution before starting, and use a recognisable filename such as Paper Plane Short.mp4.

Illustration: H.264 MP4 is selected for the finished Short, with “Paper Plane Short.mp4” as the filename.

Open the exported file before uploading it to YouTube. Check the beginning, caption timing, full flight, sound accent and final reaction in the rendered video. Keep the editable timeline for a new opening or another platform layout. If you want to finish in Premiere Pro, Final Cut Pro or DaVinci Resolve, choose an editable-project export separately from the finished MP4.

This approach is useful when you already have recordings and want help turning them into a deliberately paced Short, with control over the details. If your starting point is a long interview instead, follow the separate guide to finding and developing multiple Shorts with the built-in agent.

Frequently asked questions

Do I need ChatGPT or Claude to edit this Short?

No. This workflow uses the built-in assistant inside invideo Editor. Upload the footage, explain the intended result and direct the edit from the editor’s own chat.

Can I edit a Short from several separate recordings?

Yes. Add the recordings to one project and describe the role of each. The agent can select takes and assemble them into one timeline. Review continuity and keep complete actions when they matter to the result.

Can I use horizontal footage in a vertical Short?

Yes. Reframe individual shots for the portrait canvas, or fit a wide shot inside it when its full width is essential. Check moving subjects, hands and text throughout the shot rather than applying one crop to every clip.

Is AI editing in invideo Editor free?

Manual editing and video exports are free and watermark-free. Work performed by the built-in agent uses invideo credits, and generating new images, video or audio uses credits too. This example uses recorded footage and stock audio; it does not require generated media.

Can I change everything manually after the AI edit?

Yes. The full professional editing suite remains available for clips, captions, graphics, animation, colour and audio. Make creative adjustments on the frame-accurate multitrack timeline, then continue working with the built-in assistant from that updated edit.