YouTube Transcription & Translation to Google Docs with Gemini AI

## 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. ## 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. ## How It Works 1. A **Webhook** triggers the flow with inputs: `youtube_url`, `language`, and `enable_summary`. 2. A **Code** node formats these inputs into `videoId`, `originalUrl`, `language`, and `enable_summary`. 3. An **HTTP Request** node sends the video to Supadata API for full transcription. 4. Another **Code** node combines all transcript segments into one body of text. 5. The **Basic LLM Chain** node uses the **Google Gemini Chat Model** to summarize and translate the transcript if requested. 6. A **Google Docs** node creates a new document with a title based on `videoId` and `language`. 7. A final **Google Docs** node appends the processed summary and translation into the created document. ## How to Set Up 1. **Webhook Input:** Send a POST request with three fields: `youtube_url`, `language`, `enable_summary`. 2. **Configure Supadata API:** Add the HTTP URL and Authorization Header for transcription. 3. **Set up Gemini Chat Model:** Use Google Vertex AI/Gemini integration in the Basic LLM Chain node. 4. **Create Google Docs Credentials:** Connect your Google account using OAuth2. 5. **Document Naming Logic:** You may adjust document titles using expressions (e.g., `{{ videoId }} - {{ language }}`). ## Requirements * Supadata API key (or any video-to-text API). * Google account with Google Docs access. * Google Gemini access via n8n's LLM integration. * n8n Cloud or self-hosted instance. * Basic understanding of webhook setup (or a form frontend). ## How to Customize * **Change LLM model:** Swap Gemini with GPT-4 or Claude in the LLM Chain node. * **Summarization toggle:** Use the `enable_summary` flag to control verbosity. * **Document layout:** Customize headings, font styles, and content sections in Google Docs. * **Multiple languages:** Extend the workflow to translate into multiple languages and generate one document per language. * **Sharing options:** Add Gmail or Slack nodes to notify users once the document is generated. ## Add-ons * **Notion Export:** Send the document summary directly into Notion using the Notion node. * **Slack Notification:** Notify your team with a link to the Google Doc using the Slack node. * **Google Sheets Logging:** Log video URLs, timestamps, and language used for auditing. * **n8n Forms Integration:** Allow users to submit video URLs and language via a hosted n8n form. ## **Use Case Examples** * **Repurposing Videos into Blogs:** Automatically convert YouTube podcasts into multilingual blog posts. * **Educational Notes:** Extract and translate lecture content into shareable study documents. * **International Marketing Teams:** Summarize and localize product explainer videos for different countries. * **Transcription Library:** Create a searchable database of translated transcripts from niche educational YouTube channels. ## Common Troubleshooting | **Issue** | **Possible Cause** | **Solution** | |--------------------------|-------------------------------------|---------------------------------------------------------------| | Webhook not triggering | Incorrect webhook URL or POST format | Double-check payload and content-type (application/json) | | Transcription API fails | Invalid video ID or API key | Validate YouTube URL and Supadata API access | | Empty translation/summarization | Transcript was empty or prompt was weak | Ensure the video contains spoken content and refine prompt | | Google Doc not created | OAuth2 credentials not authorized properly | Reconnect Google Docs credentials in n8n | | Gemini LLM Chain fails | Model misconfigured or request malformed | Verify your model selection and payload structure | ## Need Help? Need help getting this set up or customizing it for your workflow? We can help you: * Set up transcription and translation APIs * Modify the summarization prompt * Customize document layouts or automate sharing [Contact WeblineIndia's automation experts!](https://www.weblineindia.com/hire-n8n-developers/)