🎬 Generate YouTube thumbnails via Telegram using BrowserAct and Gemini (Nano Banana Pro)

⚡ 103 views · 🎬 Content Creation & Video

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Description

Generate YouTube thumbnails via Telegram using BrowserAct & Nano banana Pro

This workflow acts as an AI-powered “Viral Architect” for YouTube creators. Simply send a video topic (e.g., “Kling 2.6”) to your Telegram bot, and it will scrape top-performing competitor thumbnails, analyze their visual strategies using AI vision, and generate a new, scientifically optimized thumbnail concept and image for you.

Target Audience

YouTubers, content creators, and social media managers looking to increase their Click-Through Rate (CTR) with AI-designed thumbnails.

How it works

  1. Analyze Intent: The workflow receives a message via Telegram. An AI Agent classifies the input: is it a casual chat or a request for a thumbnail?
  2. Research Competitors: If a topic is detected, BrowserAct scrapes YouTube for the top-ranking videos on that subject.
  3. Visual Forensics: An AI Vision Agent (using OpenRouter/GPT-4o) analyzes the scraped thumbnails to understand why they work (colors, composition, text).
  4. User Approval: The bot sends a confirmation button to Telegram to ensure you want to proceed with image generation (saving credits).
  5. Creative Synthesis: Upon approval, a specialized Gemini Agent aggregates the research and crafts a high-fidelity prompt using psychological hooks and pop-culture references.
  6. Generate & Deliver: Google Gemini renders the final 4K thumbnail image, which is sent back to your Telegram chat.

How to set up

  1. Configure Credentials: Connect your Telegram, BrowserAct, Google Sheets, OpenRouter, and Google Gemini accounts in n8n.
  2. Prepare BrowserAct: Ensure the Thumbnail Maker Bot template (or a YouTube search scraper) is saved in your BrowserAct account.
  3. Setup Google Sheet: Create a Google Sheet to store analysis data. The workflow will dynamically create tabs, but you need a master sheet ID.
  4. Configure Telegram: Ensure your bot is created via BotFather and the API token is added to the Telegram credentials.
  5. Activate: Turn on the workflow.

Requirements

Google Sheets Requirements

  1. Keyword
  2. Current Workflow Sheet ID

How to customize the workflow

  1. Change Art Style: Modify the system prompt in the Generate Image Prompt agent to enforce a specific aesthetic (e.g., “3D Render,” “Anime,” “Minimalist”).
  2. Adjust Research Depth: Change the number of videos scraped by BrowserAct to analyze more or fewer competitors.
  3. Add Text Overlay: Add an image processing node (like Cloudinary or Bannerbear) to automatically overlay the generated text onto the image for a final polish.

Need Help?

Workflow Guidance and Showcase Video

🔗 Nodes Used

Google Sheets, Telegram, Telegram Trigger, AI Agent, Structured Output Parser, Google Gemini Chat Model

📥 Import

Download workflow.json and import into n8n: Workflow menu → Import from File

📖 Importing guide · 🔑 Credential setup