YouTube Transcription, Summarization & Translation to Google Docs

This workflow automates the end-to-end process of converting YouTube videos into structured, multilingual written content.
It transcribes the video's speech, optionally summarizes it, translates it into the chosen language, and stores the result in a well-formatted Google Doc — ready for review, sharing, or publication.

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🎯 Who’s It For

• Content creators and bloggers repurposing video content.
• Educators and researchers converting lectures into readable notes.
• Marketing teams localizing video material for international audiences.
• Students summarizing and translating study material.
• YouTube viewers who want written notes or blog-ready formats.

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⚙️ How It Works

1. Webhook Trigger – Accepts inputs: youtube_url, language, enable_summary.
2. Code Node – Formats these into videoId, originalUrl, language, enable_summary.
3. HTTP Request Node – Sends the video to Supadata API for transcription.
4. Code Node – Combines transcript segments into one text block.
5. Basic LLM Chain Node – Uses Google Gemini to summarize and translate (if requested).
6. Google Docs Node – Creates a new document titled with videoId and language.
7. Google Docs Append Node – Appends transcript/summary/translation to the created doc.

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🔧 How to Set Up

1. Webhook Input
   • Send a POST request with JSON body:

     {
       "youtube_url": "https://youtube.com/...",
       "language": "fr",
       "enable_summary": true
     }

2. Configure Supadata API
   • Add HTTP URL and Authorization Header for transcription.
3. Set up Gemini Chat Model
   • Use Google Vertex AI / Gemini in the LLM Chain node.
4. Google Docs Credentials
   • Connect Google account via OAuth2.
5. Document Naming Logic
   • Example: {{ videoId }} - {{ language }}.

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✅ Requirements

• Supadata API key (or any video-to-text API).
• Google account with Google Docs access.
• Google Gemini (Vertex AI) integration in n8n.
• n8n Cloud or self-hosted instance.
• Basic knowledge of webhook setup.

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🎨 How to Customize

• Change LLM Model → Swap Gemini with GPT-4 or Claude.
• Summarization Toggle → Use enable_summary flag.
• Document Layout → Customize headings, font styles, and structure.
• Multiple Languages → Generate one doc per target language.
• Sharing Options → Add Gmail or Slack nodes for auto-notifications.

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➕ Add-ons

• Notion Export → Push summaries into Notion.
• Slack Notification → Share Google Doc links with team.
• Google Sheets Logging → Log processed video details.
• n8n Forms Integration → Allow user-submitted inputs.

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📌 Use Case Examples

• Repurposing podcasts into multilingual blog posts.
• Extracting and translating lecture notes for education.
• Localizing explainer videos for global marketing teams.
• Building a searchable database of translated transcripts.

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🛠️ Common Troubleshooting

Issue	Possible Cause	Solution
Webhook not triggering	Incorrect URL or POST format	Double-check payload & content-type (application/json)
Transcription API fails	Invalid video ID or API key	Validate YouTube URL & Supadata API access
Empty translation/summary	Transcript empty or weak prompt	Ensure spoken content exists & refine prompt
Google Doc not created	OAuth2 credentials not authorized	Reconnect Google Docs credentials
Gemini LLM Chain fails	Misconfigured model or malformed req	Verify model selection & payload

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🤝 Need Help?

WeblineIndia automation experts can help you:

• Set up transcription and translation APIs.
• Modify and optimize the summarization prompt.
• Customize Google Docs layouts or automate sharing.

👉 Contact us to tailor this workflow for your needs!

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