Multi-User Telegram Bot to Summarize & Repurpose YouTube Videos with GPT-4o

Description

👤 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 chat_id.

✅ 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 https://platform.openai.com/account/api-keys)
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
Configure the Telegram Trigger node with your bot token.
In the HTTP Request node, set:
X-RapidAPI-Key: your RapidAPI key
X-RapidAPI-Host: your RapidAPI host URL
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