How to AI edit a video: a step‑by‑step guide with examples

Here is the short version of how to AI edit a video: put your footage into an editor that transcribes it, let the AI do the mechanical passes (cut filler words and retakes, clean the audio, add captions), then review every cut yourself before you export. The AI handles the tedious 80%. You still own the judgement calls.

Think of an AI video editor as a fast junior assistant working from a transcript. It is very good at finding every "um" in a 40-minute recording. It is not good at knowing which joke landed. This guide walks through a practical workflow using two tools that cover most needs: Descript for talking-head, podcast and webinar footage, and CapCut for short vertical clips. We built it from the official docs and published guides as of late October 2026; nobody at The AI Future hands-on tested these tools for this piece.

If you want to generate new footage from a prompt rather than edit footage you already shot, start with our pillar guide on how to make AI videos instead.

What you need before you start

• Raw footage with clear speech. Most AI editing works off the transcript, so audio quality drives everything downstream.
• A goal in one sentence. For example: "an 8-minute YouTube video plus three clips under 60 seconds". AI tools give better results with a target length, platform and audience.
• An editor with AI tools. Descript's free plan includes 1 media hour per month, 100 one-time AI credits and 720p export with a watermark; paid plans start at $16 per person per month on annual billing, with 10 media hours and 400 AI credits (Descript pricing, checked October 2026).
• Optional: CapCut for short-form. CapCut's own comparison lists Pro at $19.99 per month or $179.99 per year, varying by region, and says advanced AI tools such as the auto caption generator, background remover and noise reduction sit in Pro on its desktop app (CapCut, checked October 2026). Check what your app version offers before you plan around it.

If you prefer to watch first, this walkthrough from Dan Kieft gives a tour of Descript's AI editing features.

How to edit a video with AI, step by step

The order matters. Fix the transcript and audio before you cut, and cut before you style. Doing it backwards means redoing work and, on credit-based plans, paying for it twice.

Step 1: Import and transcribe

Create a new project and drag your file in. Descript starts transcribing automatically once the file lands in the project (Descript). Each uploaded or recorded file counts against your monthly media hours, whether or not you transcribe it (Descript pricing FAQ).

Chase Jarvis's guide recommends labelling speakers straight away, because the AI uses those labels to make smarter cuts later (Chase Jarvis).

Step 2: Correct the transcript

Spend five minutes here. Misheard names and jargon cause bad cuts and bad captions. In Descript, double-click a word, click Correct (or press C), type the fix, then choose Correct or Correct All. Correcting changes the text only, not the audio or video underneath (Descript Help Center).

Step 3: Clean up the audio

Descript's Studio Sound isolates your voice and regenerates it to remove echo and background noise, rather than just filtering it (Descript). One caution from Jarvis's workflow: at full intensity it "can sound robotic and clip the ends of words", so he suggests dialling it down to 70–85% (Chase Jarvis).

Step 4: Make the rough cut with a prompt

This is where the AI saves the most time. Descript's agent, Underlord, sits in a sidebar and can generate a rough cut, remove filler words and retakes, add B-roll and apply effects from one instruction (Descript). Descript's own advice is to be specific about length, platform, tone and audience. Here is an example to adapt (not a tested output):

Edit this webinar recording down to about 8 minutes for YouTube. Keep the three product demos and the Q&A answer about pricing. Remove filler words, false starts and retakes. Shorten pauses longer than one second. The audience is small-business owners who have never used our product.

Without the agent, you can do the same thing by hand: delete words in the transcript and the matching footage goes with them. That is the core of text-based editing.

Step 5: Add visuals, captions and polish

Once the cut is right, ask for the cosmetic layer. Descript lists jobs like hiding jump cuts with zooms, adding lower thirds and centring every speaker as things Underlord can batch (Descript). An example prompt:

Add a subtle zoom on every jump cut. Add a lower third with my name and title the first time I speak. Add captions in a clean white style with the current word highlighted.

If you need narration over B-roll, see our guide on how to add AI voice to a video.

Step 6: Cut short clips and caption them in CapCut

For vertical clips, CapCut's online editor workflow is: create a new video, upload your file and drag it to the timeline, open the Subtitles tab, choose Automatic Captions, pick the spoken language and click Generate (CapCut). Then review the text, fix timing and style the captions. Our CapCut AI video maker guide covers CapCut's other AI features in more depth.

This beginner tutorial from Metics Media covers the CapCut interface if you have not used it before.

Step 7: Review, then export

Watch the whole edit at normal speed once. AI cuts often clip the first syllable of a sentence or remove a pause that was there for effect. In Descript, click Publish, go to the Export tab, choose a file type and export (Descript). Free exports are 720p with a watermark; paid plans export at 1080p or 4K depending on tier (Descript pricing).

Example: a complete worked example

Say you have a 25-minute webinar recording and want one 8-minute YouTube video plus three vertical clips under 60 seconds each.

Stage	What you do	What it uses
Import	Upload the 25-minute file to Descript	25 of the free plan's 60 media minutes
Fix	Correct product names with Correct All; apply Studio Sound at around 75%	AI credits for Studio Sound
Rough cut	Run the 8-minute prompt from step 4	AI credits
Review	Watch all 8 minutes, restore any lost context	About 10 minutes of your time
Clips	Ask for the three strongest moments under 60 seconds, styled vertically	AI credits
Export	Export the main video and clips	720p with watermark on free; paid removes it

The clip prompt might look like this (an example to adapt):

From the finished 8-minute edit, find the three moments most likely to work as standalone clips for Instagram Reels. Each should be under 60 seconds, start with a strong sentence, and make sense without the rest of the video. Make them vertical with large captions.

The numbers worth watching: 25 minutes is a big share of a free monthly allowance, and Descript's free AI credits are a one-time 100, not monthly (Descript pricing). Jarvis notes that Studio Sound costs roughly 10 credits per use and that heavy users often run out of credits before media hours (Chase Jarvis). For a weekly show, budget for a paid plan.

Common mistakes and how to fix them

This is where AI editing breaks.

• Vague prompts. "Cut this down" gives generic results. Descript's team suggests something like a fast-paced highlight reel "for TikTok with a humorous tone, that’s less than 60 seconds" (Descript).
• Telling it what not to do. Descript says Underlord responds better to positive instructions. Say "make the tone warmer" rather than "less robotic" (Descript).
• Repeating a failed prompt. Rephrase from a different angle. One podcaster in Descript's primer couldn't get the agent to keep only his parts, so he asked it to remove everyone else instead, and that worked (Descript).
• Skipping transcript fixes. Wrong words produce wrong captions and odd cuts. Fix them in step 2.
• Over-processing audio. Full-strength noise removal can sound artificial. Lower the intensity and listen on headphones.
• Trusting the cut blind. Always watch the full export. AI tools can misread context and remove the setup to a point you make later.

Tips to get better results

• Build prompts up gradually. Descript's primer describes a podcaster who refined single prompts until each was reliable, then chained them into one prompt he says does "about 90% of the work" (Descript).
• Ask the AI to check its own work before moving on, so you don't spend credits fixing knock-on errors.
• Style the main edit first, then cut clips. Descript's CEO found bulk styling worked better in that order (Descript).
• Use the right tool for the job. Transcript-based editors suit speech-heavy footage. For music videos or action footage with little dialogue, a timeline editor gives you more control. For long videos you want turned into shorts, see our Opus Clip AI review.

Next steps

Once your editing workflow is set, these guides cover the rest of the pipeline:

• How to make AI videos for YouTube
• How to use CapCut's AI video maker
• The best AI video generators, if you need generated B-roll

FAQ

How to edit a video using AI?

Upload your footage to an AI editor such as Descript or CapCut and let it transcribe the speech. Correct the transcript, apply AI audio cleanup, then use a prompt or one-click tools to remove filler words, retakes and long pauses. Add captions and visuals, watch the full edit, and export.

How to use AI to edit a video?

Give the AI a specific goal: target length, platform, audience and tone. In Descript, you type that into the Underlord sidebar and it makes the rough cut. Then refine with follow-up prompts or by deleting words in the transcript. Review the result yourself, because AI cuts can lose context.

How to use AI for video editing?

Use AI for the repetitive passes: transcription, filler-word removal, noise reduction, captions, reframing and finding short clips. Keep creative choices, like story order, pacing and which moments matter, for yourself. Text-based editors work best for speech-heavy footage such as interviews, podcasts, tutorials and webinars.

How to edit videos with AI?

Follow a fixed order: import, fix the transcript, clean the audio, rough cut, add visuals and captions, then review and export. Doing the cosmetic work last avoids redoing it. Watch your plan limits too: Descript's free plan gives 1 media hour a month and exports 720p with a watermark.