YouTube Transcript → Newsletter & Social Posts (OpenAI) n8n Webhook

Turn any YouTube video into a ready-to-send newsletter + social posts—via a single n8n webhook

This YouTube Transcript → Newsletter & Social Posts (OpenAI) n8n Webhook workflow receives a YouTube URL, pulls (or accepts) the transcript, uses the OpenAI Chat Completions API to generate a newsletter issue plus X (Twitter) and LinkedIn repurposed content, and returns both structured JSON and a Markdown draft in one response.

What this workflow does

• Receives a POST webhook with url (and optionally transcript).
• Extracts and validates the YouTube video ID from the provided URL.
• Uses your transcript if provided; otherwise fetches captions from youtubetranscript.com and converts them into plain text.
• Sends the transcript to the OpenAI Chat Completions API to generate: subject line, preview text, four newsletter sections, takeaways, an X thread, a LinkedIn post, and a call to action—returned as strict JSON.
• Parses and normalizes the AI output into consistent fields, using fallbacks if parsing fails.
• Builds a newsletter Markdown document including the source video link, sections, takeaways, and the repurposed posts—then returns everything as a JSON response.

Use cases

• Publish newsletters from internal or creator YouTube content without manual rewriting.
• Repurpose weekly video insights into consistent newsletter + X + LinkedIn campaigns.
• Use the webhook as a trigger for your own publishing pipeline (store JSON fields, post Markdown, or render templates).

Technical details

• n8n nodes: Webhook, Code, HTTP Request, Respond to Webhook.
• External services: youtubetranscript.com (caption fetching) and OpenAI Chat Completions API.
• Requires an OpenAI API key set in the workflow’s Authorization header for the Chat Completions request.