Auto-generate YouTube chapters with Gemini AI & YouTube Data API v3
## **Auto-Generate YouTube Chapters with AI-Powered Transcript Analysis**
### **Overview**
This workflow uses **YouTube Data API v3** and **Google Gemini 1.5 Flash AI** to automatically generate timestamped chapters for videos by analyzing SRT captions. It enhances viewer navigation, improves SEO , and saves creators time by automating manual tasks.
---
### **Prerequisites**
#### **YouTube API Setup**
1. **Create a Google Cloud Project**
- Go to the [Google Cloud Console](https://console.cloud.google.com/).
- Click **Select a project** > **New Project** and name it (e.g., "YouTube Chapters Automation") .
2. **Enable YouTube Data API v3**
- Navigate to **APIs & Services > Library**.
- Search for "YouTube Data API v3" and click **Enable** .
3. **Configure OAuth Consent Screen**
- Go to **APIs & Services > OAuth consent screen**.
- Select **External** (public) or **Internal** (testing), then add required details (app name, support email) .
4. **Generate OAuth 2.0 Credentials**
- Under **Credentials**, click **Create Credentials** > **OAuth client ID**.
- Choose **Web app**, then download the JSON key file .
5. **Add Credentials to n8n**
#### **Other Requirements**
- **Google Gemini API**: Configure access for the `gemini-1.5-flash-8b-exp-0924` model by getting the api key.
---
### **Workflow Steps**
1. **Set Video ID**
- Input the target video ID (e.g., `r1wqsrW2vmE`) using the `Set Video ID` node.
2. **Fetch Video Metadata**
- Use the **YouTube API** node to retrieve the video’s title, category, and existing description .
3. **Download SRT Captions**
- **Get Caption ID**: Call `https://www.googleapis.com/youtube/v3/captions` to fetch the caption track ID .
- **Download Transcript**: Use the ID to retrieve SRT data via `https://www.googleapis.com/youtube/v3/captions/{{ID}}?tfmt=srt` .
4. **Analyze Transcript with Gemini AI**
- Process the SRT file with **Google Gemini AI** to identify chapters using a prompt like:
```plaintext
"Classify this transcript into timestamped chapters (e.g., 00:00 - Introduction)."
```
- Validate output with a structured parser (e.g., `Structured Captions` node) .
5. **Update Video Description**
- Append chapters to the description using the YouTube API’s `videos.update` method .
---
### **Value Proposition**
- **Viewer Experience**: Chapters improve navigation and reduce drop-off rates .
- **SEO Benefits**: Structured descriptions enhance search visibility .
- **Time Savings**: Eliminates manual chapter creation .
