Send a YouTube Link via Telegram, Auto-Transcribe and Generate a Shorts Script

Input: YouTube video URL (sent via Telegram); Processing: Supadata transcript + Gemini 2.5 Pro script generation; Output: title and script returned via Telegram

Who

Content creators and social media marketers who need to quickly repurpose long videos into YouTube Shorts scripts

You get

Send any YouTube link to a Telegram bot and receive a 170–200 word Shorts script (title + body) within minutes

You need

n8n · telegram · supadata

Steps

1. Prepare environment and credentials

   Ensure you are running a self-hosted n8n instance, as the community node is not compatible with n8n Cloud. Install n8n-nodes-supadata via Settings > Community Nodes. Then add three credentials in n8n: Telegram API (bot token from BotFather), Supadata API (sign up at https://supadata.com/), and Google Gemini API (use the googlePalmApi credential type with your Gemini API key).

2. Install the community node

   In the n8n interface, go to Settings > Community Nodes, click Install, enter the package name n8n-nodes-supadata, and confirm. The Supadata node will appear in the node panel after installation.

3. Import the template and configure nodes

   Import this workflow from the n8n template library (or rebuild manually from workflow.json). Verify credentials are bound to each node: Input URL (Telegram Trigger) uses telegramApi; Make Transcribe (Supadata) uses supadataApi; Google Gemini Chat Model uses googlePalmApi. The Script mapping (Set) node contains the expression `={{ $json.content.map(item => item.text).join('\n') }}` to flatten the Supadata transcript array into a single text block. The Parsing (Structured Output Parser) node expects a JSON Schema with title and script fields.

4. Configure the AI script generation prompt

   Open the Create Script (Basic LLM Chain) node and confirm promptType is define and hasOutputParser is true. This node contains two source prompts: a system message that defines the script style and format constraints, and a user text field that feeds the full transcript as background context.

   Execution prompt · Source text。Create Script node messages.messageValues[0].message (system message)

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   =You are a professional scriptwriter for YouTube Shorts, specializing in trivia across various genres.
   Based on the background information from the YouTube transcript provided by the user, you will create the ultimate script to captivate viewers. Your expertise lies in crafting scripts that interestingly convey fascinating trivia hidden in science, nature, culture, and daily life. Please use an intelligent yet friendly narrative style.
   
   #Conditions
   
   The content must be based on accurate information.
   
   Structure the script to introduce a lot of trivia at a good tempo, minimizing transitional words.
   
   Speak intelligently in a casual tone.
   
   The script should be approximately 170-200 words.
   
   The opening sentence must be a shocking fact or a line that strongly stimulates the viewer's curiosity. Get straight to the point.
   
   Do not include narration or timestamps; generate only the pure script text.
   
   Create the script based on the background information from the provided YouTube transcript.
   
   Do not use bold text.
   
   Use periods to break lines appropriately.
   
   #Output Format
   title:
   script:

   Execution prompt · Source text。Create Script node text field (user message / background context)

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   =#background information
   {{ $json.full_script }}

5. Activate and test

   Activate the workflow. Send a YouTube video URL to your Telegram bot. The workflow will execute automatically: fetch transcript → flatten text → Gemini generates script → parse structured output → return result via Telegram. You should receive a message containing the title and script body.

   Execution prompt · Source text。Send Summary node text field (Telegram message template)

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   ={{ $json.output.title }}
   
   {{ $json.output.script }}

You are assisting someone to reproduce an n8n workflow template. First confirm they have: 1) a self-hosted n8n instance, 2) a Telegram bot created via BotFather, and 3) Supadata and Gemini API keys. Then guide them to install the community node, import the workflow, bind credentials, and activate for testing. Do not perform API calls on their behalf.