17h • General Discussion 💬
Auto-Generate Automation Documentation From a Loom or YouTube Video in n8n
Documentation is one of the most important parts of building automation systems.
It is also one of the most tedious.
In this video, I show a system that turns a walkthrough video plus a workflow screenshot into a clean, structured Google Doc.
No more writing SOPs from scratch.
What the system produces:
- A well formatted Google Doc
- Clear sections for setup, nodes, APIs, and deployment notes
- Screenshot placeholders so you know exactly where visuals should go
- A production checklist you can use before shipping
How it works, step by step:
1. Submit a form
- Video URL (YouTube or an unlisted upload)
- Workflow screenshot (file upload)
2. Extract the screenshot for later use
- Convert the uploaded image into a base64 string
- Store it so it can be referenced further down the workflow
3. Pull the video transcript with Apify
- Run the YouTube Transcript Scraper
- Return the transcript data
4. Clean the transcript with a Code node
- Combine all transcript segments into a single readable paragraph
5. Convert the stored screenshot back into a file
- Move base64 back into a file so it can be analyzed
6. Analyze the workflow screenshot with OpenAI
- Generate a structured description of what the workflow is doing
7. Generate the documentation with Claude via OpenRouter
- Feed it two inputs:
- Transcript text
- Workflow screenshot description
- Output a JSON with:
- Documentation title
- Full markdown documentation
8. Parse the JSON output
- Split out title and documentation fields cleanly
9. Create a Google Doc from Markdown
- Use a community node that supports Markdown to Google Docs formatting
- Auto-create the doc in the correct Drive folder
Result:
You record a 10 minute walkthrough, upload one screenshot, and the system drafts the entire doc for you.
If you want to build it, the blueprint and prompts are linked in the description.
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Auto-Generate Automation Documentation From a Loom or YouTube Video in n8n
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