# From a 79-minute recording to 21 minutes: the REVIEW\.md edit

The REVIEW\.md episode was recorded with CutZal's in-app recorder, and the 79-minute 12-second raw recording was cut to a 21-minute 5-second video published on October 25, 2026.

The video covers how the Claude Code team reviews code (REVIEW\.md and seven review layers). It is in Korean, with uploaded English subtitles. It was made with books sponsored by Gilbut Publishing, as disclosed in the video description. The content itself is in the [YouTube video](https://www.youtube.com/watch?v=J6MsYjDB93k). This post only covers how the video was recorded and edited.

## At a glance

| Item              | Value                                                          |
| ----------------- | -------------------------------------------------------------- |
| Recording         | CutZal in-app recording, started October 24, 2026 at 18:22 KST |
| Recorded channels | Screen (60 fps), camera (30 fps), microphone                   |
| Raw recording     | 79:12                                                          |
| Final cut         | 21:05 (about 27% of the recording)                             |
| Graphics          | 59 scenes (56 under the camera, 3 over the camera)             |
| Published         | October 25, 2026, 17:42 KST                                    |
| Subtitles         | Korean, English, Japanese, Vietnamese                          |

![For the REVIEW.md episode, the final cut is 21:05 out of a 79:12 raw recording, about 27% of the original length.](/blog/static/svg/length-en.a726f979c3.svg)
The lengths were measured from the recording files and the exported final cut with ffprobe, and the graphics were counted in the saved project (checked October 27, 2026).

## Recording: three channels, saved separately

CutZal's in-app recorder saves the screen, the camera, and the microphone as separate files. This recording was saved the same way: a full-screen recording (60 fps), the camera (30 fps), and the microphone audio.

When you stop recording, a project with the three channels already aligned opens right away. So editing starts without importing the files again.

## Graphics: 59 agent-made scenes, placed with commands

An AI agent made the graphics as one video file per scene. In CutZal, the files were registered as assets with the `cutzal` command and placed on tracks at their output times in the final cut.

- Graphics laid under the camera: 56 scenes
- Graphics laid over the camera: 3 scenes

![A scene from the REVIEW.md video. A PR passes through seven review layers in order across the screen, with the camera in a small window on the right.](/blog/static/image/graphic-base.aab6deedd6.webp)
_A graphic under the camera: the seven layers a PR goes through, on one line._

![A scene from the REVIEW.md video. A feature owner and an on-call engineer watch request, latency, and error graphs after a deploy, with the camera in a small window on the right.](/blog/static/image/graphic-deploy.b17acc5fad.webp)
_A graphic under the camera: who watches what after a deploy._

Graphics laid over the camera need a transparent background. So these scenes went in as VP9 alpha WebM files.

![A scene from the REVIEW.md video. A card listing the seven review layers sits over the full-frame camera on a transparent background.](/blog/static/image/overlay-top.7eb86c9fbe.webp)
_A graphic over the camera: the layer list card floats over the face._

## What a person fixed

After the graphics were placed, DevBrother watched the draft in CutZal and pointed out what to fix.

- One pause (1.9 seconds) and one stumble (0.9 seconds) were cut. The graphics after the changed cuts were placed again to match the new times.
- All English text in the graphics of the book sponsorship section was changed to Korean.
- The camera mirroring was turned off in that section only, so the book being introduced does not appear flipped.

From the point CutZal records corrections, each post will report how many cuts the AI made and how many a person changed, on the same basis.

## Subtitles: four languages from the exported SRT

The `final.srt` that CutZal exported was the source for the Korean, English, Japanese, and Vietnamese subtitles.

Before translation, the subtitle line breaks were reset on word boundaries. Lines that do not break mid-sentence translate more naturally.

## What changed for the next video

- Every upload now gets Korean and English subtitles together. Other languages are added when they make up 3% or more of overseas views over the last 90 days. This time, that was Japanese and Vietnamese.
- Graphics laid over the camera are made as VP9 alpha WebM from the start.

The next long-form video will be edited in CutZal and logged here too. Sign up below to hear about the launch first.