Block 1 - Structured Output Parser
- Type / Role
- @n8n/n8n-nodes-langchain.outputParserStructured - outputParserStructured
- Config choices
- Version 1.3
Generate YouTube thumbnails via Telegram using BrowserAct and Gemini (Nano Banana Pro)
Workflow preview
100%
$20/month : Unlimited workflows
2500 executions/month
THE #1 IN WEB SCRAPING
Scrape any website without limits
HOSTINGER 
Early Deal
DISCOUNT 20% Try free
Early DealDISCOUNT 20%
Self-hosted n8n
Unlimited workflows - from $4.99/mo
#1 hub for scraping, AI & automation
6000+ actors - $5 credits/mo
1. Workflow Overview
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")...
Best for
- Content Creation automation workflows
- Multimodal AI automation workflows
- advanced n8n builders looking for reusable templates
Tools used
@n8n/n8n-nodes-langchain.outputparserstructured, n8n-nodes-browseract.browseract, @n8n/n8n-nodes-langchain.lmchatopenrouter, n8n-nodes-base.splitinbatches, @n8n/n8n-nodes-langchain.googlegemini, @n8n/n8n-nodes-langchain.agent, n8n-nodes-base.telegram, n8n-nodes-base.googlesheets
Source and attribution
This workflow is cataloged by N8N Workflows and links back to its original n8n.io source page by Madame AI Team | Kai.
Original n8n.io source1.1 Workflow description
- Title
- Generate YouTube thumbnails via Telegram using BrowserAct and Gemini (Nano Banana Pro)
- Workflow name
- Generate YouTube thumbnails via Telegram using BrowserAct and Gemini (Nano Banana Pro)
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
- 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?
- Research Competitors: If a topic is detected, BrowserAct scrapes YouTube for the top-ranking videos on that subject.
- Visual Forensics: An AI Vision Agent (using OpenRouter/GPT-4o) analyzes the scraped thumbnails to understand why they work (colors, composition, text).
- User Approval: The bot sends a confirmation button to Telegram to ensure you want to proceed with image generation (saving credits).
- Creative Synthesis: Upon approval, a specialized Gemini Agent aggregates the research and crafts a high-fidelity prompt using psychological hooks and pop-culture references.
- Generate & Deliver: Google Gemini renders the final 4K thumbnail image, which is sent back to your Telegram chat.
How to set up
- Configure Credentials: Connect your Telegram, BrowserAct, Google Sheets, OpenRouter, and Google Gemini accounts in n8n.
- Prepare BrowserAct: Ensure the Thumbnail Maker Bot template (or a YouTube search scraper) is saved in your BrowserAct account.
- Setup Google Sheet: Create a Google Sheet to store analysis data. The workflow will dynamically create tabs, but you need a master sheet ID.
- Configure Telegram: Ensure your bot is created via BotFather and the API token is added to the Telegram credentials.
- Activate: Turn on the workflow.
Requirements
- BrowserAct account with the Thumbnail Maker Bot template.
- Telegram account (Bot Token).
- Google Sheets account.
- OpenRouter account (for Vision capabilities).
- Google Gemini account.
Google Sheets Requirements
- Spreadsheet Name: Thumbnail Data base
- Sheet Name: Database
- Required Columns:
- Keyword
- Current Workflow Sheet ID
How to customize the workflow
- Change Art Style: Modify the system prompt in the Generate Image Prompt agent to enforce a specific aesthetic (e.g., "3D Render," "Anime," "Minimalist").
- Adjust Research Depth: Change the number of videos scraped by BrowserAct to analyze more or fewer competitors.
- 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?
- How to Find Your BrowserAct API Key & Workflow ID
- How to Connect n8n to BrowserAct
- How to Use & Customize BrowserAct Templates
Workflow Guidance and Showcase Video
1.2 Logical Blocks
This catalog entry is organized from the workflow JSON. The node-level section below shows the executable blocks available for review before importing the template.
2. Block-by-Block Analysis
Block 2 - Run a workflow
- Type / Role
- n8n-nodes-browseract.browserAct - browserAct
- Config choices
- Version 1
Block 3 - OpenRouter Chat Model
- Type / Role
- @n8n/n8n-nodes-langchain.lmChatOpenRouter - lmChatOpenRouter
- Config choices
- Version 1
Block 4 - Loop Over Items
- Type / Role
- n8n-nodes-base.splitInBatches - splitInBatches
- Config choices
- Version 3
Block 5 - Generate an image
- Type / Role
- @n8n/n8n-nodes-langchain.googleGemini - googleGemini
- Config choices
- Version 1
Block 6 - Validate user input
- Type / Role
- @n8n/n8n-nodes-langchain.agent - agent
- Config choices
- Version 3
Block 7 - Inform user
- Type / Role
- n8n-nodes-base.telegram - telegram
- Config choices
- Version 1.2
Block 8 - Generate Image Prompt
- Type / Role
- @n8n/n8n-nodes-langchain.agent - agent
- Config choices
- Version 3
Block 9 - Get Keywords
- Type / Role
- n8n-nodes-base.googleSheets - googleSheets
- Config choices
- Version 4.7
Block 10 - Get Images Details
- Type / Role
- n8n-nodes-base.googleSheets - googleSheets
- Config choices
- Version 4.7
Block 11 - Structured Output
- Type / Role
- @n8n/n8n-nodes-langchain.outputParserStructured - outputParserStructured
- Config choices
- Version 1.3
Block 12 - Google Gemini1
- Type / Role
- @n8n/n8n-nodes-langchain.lmChatGoogleGemini - lmChatGoogleGemini
- Config choices
- Version 1
Block 13 - User Sends Message to Bot
- Type / Role
- n8n-nodes-base.telegramTrigger - telegramTrigger
- Config choices
- Version 1.2
Block 14 - Check for Query Callback
- Type / Role
- n8n-nodes-base.switch - switch
- Config choices
- Version 3.4
Block 15 - Check For Input Type
- Type / Role
- n8n-nodes-base.switch - switch
- Config choices
- Version 3.4
Block 16 - Save Sheet ID and Keyword
- Type / Role
- n8n-nodes-base.googleSheets - googleSheets
- Config choices
- Version 4.7
Block 17 - Save Image Descriptions to Database
- Type / Role
- n8n-nodes-base.googleSheets - googleSheets
- Config choices
- Version 4.7
Block 18 - Await Continuation Approval
- Type / Role
- n8n-nodes-base.telegram - telegram
- Config choices
- Version 1.2
Block 19 - Splitting Image Items
- Type / Role
- n8n-nodes-base.code - code
- Config choices
- Version 2
Block 20 - Filter Low-Quality Images
- Type / Role
- n8n-nodes-base.code - code
- Config choices
- Version 2
Block 21 - Analyze Image Content
- Type / Role
- @n8n/n8n-nodes-langchain.agent - agent
- Config choices
- Version 3
Block 22 - Answer the User
- Type / Role
- n8n-nodes-base.telegram - telegram
- Config choices
- Version 1.2
Block 23 - Chat with User
- Type / Role
- @n8n/n8n-nodes-langchain.agent - agent
- Config choices
- Version 3
Block 24 - Validate input
- Type / Role
- @n8n/n8n-nodes-langchain.lmChatGoogleGemini - lmChatGoogleGemini
- Config choices
- Version 1
Showing the first 24 of 39 workflow blocks. Download the JSON for the full node graph.
3. Summary Table
| Workflow | Generate YouTube thumbnails via Telegram using BrowserAct and Gemini (Nano Banana Pro) |
|---|---|
| Complexity | advanced |
| Nodes | 39 |
| Categories | Content Creation, Multimodal AI |
| Author | Madame AI Team | Kai |
| Published | 01 Jan 2026 |
4. Reproducing the Workflow from Scratch
-
1. Download the workflow JSON
Use the JSON export at /data/workflows/12363/12363.json as the source template for this automation.
-
2. Import the template into n8n
Open n8n, import the downloaded JSON, and review each node before activating the workflow.
-
3. Configure credentials and variables
Replace placeholder credentials, API keys, webhook URLs, account IDs, and environment-specific values with your own settings.
-
4. Test with sample data
Run the workflow manually or in a staging workspace, inspect node output, and confirm downstream systems receive the expected data.
-
5. Activate and monitor
Enable the workflow only after testing, then monitor executions, errors, and rate limits during the first production runs.
5. General Notes & Resources
Review imported nodes carefully before activation. This catalog entry is intended to help you inspect the workflow structure, understand required services, and find related templates faster.
Node names, credentials, schedules, webhook paths, and external service limits may need adjustment for your workspace.
Frequently asked questions
What does Generate YouTube thumbnails via Telegram using BrowserAct and Gemini (Nano Banana Pro) do?
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")...
What do I need before importing this workflow?
Review the workflow JSON, configure any required credentials in n8n, and test the automation in a safe workspace before using it in production.
Can I customize this workflow?
Yes. Use the block-by-block analysis and the downloadable JSON to inspect each node, then adjust credentials, prompts, schedules, filters, or destinations for your Content Creation, Multimodal AI use case.