Multi-user Telegram bot to summarize & repurpose YouTube videos with GPT-4o

Who’s it for This workflow is for content creators, marketers, educators, or anyone who wants to instantly summarize YouTube videos and repurpose them into different formats (LinkedIn post, tweet, etc.) via a simple Telegram chatbot. ⚙️ How it works This n8n automation listens for messages in Telegram. If the message contains a YouTube link, it: - Extracts the video ID - Fetches the video transcript using RapidAPI - Cleans the transcript of any special characters - Sends it to OpenAI to generate a summary If the message is not a link, it simply acts as an AI chatbot using OpenAI with memory support. ✅ Supports follow-up prompts like: - “Make it shorter” - “Turn this into a LinkedIn post” - “Create a tweet thread” 🧑‍🤝‍🧑 Multi-User Support This Telegram bot supports multiple users simultaneously. It tracks memory and context separately for each user using Telegram's unique chatid. ✅ Each user gets personalized AI replies ✅ Follow-up commands work per user ✅ No interference between users 🛠️ Requirements - A Telegram bot token (get via @BotFather) - An OpenAI API Key (from - A RapidAPI Key and Host (typically youtube-transcript3.p.rapidapi.com) > 🚨 API keys must be added manually — they are not included in the template. 🧩 How to Set It Up 1. Configure the Telegram Trigger node with your bot token. 2. In the HTTP Request node, set: - X-RapidAPI-Key: your RapidAPI key - X-RapidAPI-Host: your RapidAPI host URL 3. Add your OpenAI API credentials to the AI Agent node. Use the provided sticky notes for guidance inside the workflow itself. 🎛️ How to Customize - Modify AI prompt behavior in the AI Agent node - Change the text formatting in the Code node - Use a different transcript API if preferred - Add commands like make it into a blog post, summarize in bullet points, etc. 📌 Notes - All nodes are renamed to reflect their function - API credentials are removed for security - Includes colored boxes and sticky notes to guide the user - Compatible with n8n cloud and self-hosted setups