n8n-Summarize-YouTube-Videos-with-GPT-4o-mini-and-Apify-Transcripts

This n8n workflow summarizes YouTube videos by accepting a YouTube URL via a form, fetching the transcript using Apify, and generating a concise summary with OpenAI GPT.
⚠️ Note: This workflow contains community nodes and is only compatible with the self-hosted version of n8n.

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✅ Prerequisites

• Apify account with access to the YouTube Transcript actor.
• OpenAI API key (for gpt-4o-mini model).
• Self-hosted n8n instance with Apify + OpenAI credentials configured.

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⚙️ Setup Instructions

🔹 Apify Setup

• Configure Apify API credentials in the Apify node.
• Verify YouTube Transcript actor ID:

OpenAI Setup:

• Add your OpenAI API key in the OpenAI Chat Model node.
• Confirm model selection is set to gpt-4o-mini.

Customization

• Modify form field to accept additional inputs if needed.
• Adjust Apify actor input JSON in the Payload node for extra metadata extraction.
• Customize the summarization options to tweak summary length or style.
• Change OpenAI prompt or model parameters in the OpenAI Chat Model node for different output quality or tone.

Steps

1. On Form Submission

• Node: Form Trigger
• Purpose: Collect the YouTube video URL from the user via a web form.

2. Prepare Payload

• Node: Set
• Purpose: Format the YouTube URL and options into the JSON payload for Apify input.

3. Fetch Transcript

• Node: Apify
• Purpose: Run the YouTube Transcript actor to retrieve video captions and metadata.

4. Extract Captions

• Purpose: Isolate the captions field from the Apify response for processing.

5. Summarize Transcript

• Purpose: Generate a concise summary of the video captions.