Automated Video Creation & Cross-Platform Publishing Workflow

This workflow demonstrates a fully automated pipeline for generating short, viral-style videos using Google's Veo3 AI video model, then publishing them across multiple social media platforms via Blotato. It combines AI creativity, cloud video generation, and a social media scheduler — all orchestrated in n8n.

Ideal for content creators, marketers, or anyone who wants to produce daily video content with minimal manual effort. The workflow runs on a schedule, generates unique video ideas and captions using GPT-4.1, creates a Veo3-compatible prompt, triggers video generation, uploads the result to Blotato, and posts to Instagram, YouTube, TikTok, Facebook, Threads, Twitter, LinkedIn, Bluesky, and Pinterest. All intermediate and final data is logged in Google Sheets for tracking.

Node-by-Node Breakdown

1. Trigger: Run Daily Script Generator (Schedule Trigger, No auth) — Runs the workflow daily based on the configured interval (default: not set; user should define a schedule).
2. AI Agent: Generate Video Concept (LangChain Agent, OAuth2 / API Key — uses OpenAI) — Sends a user-provided topic (e.g., "a Yeti doing a vlog") to an OpenAI GPT-4.1 model with a strict system prompt that forces the output into a JSON array containing a caption, idea, environment description, and status. Requires an OpenAI credential configured in n8n.
3. Tool: Inject Creativity (Tool, No auth) — A placeholder tool that can be extended to inject external creativity or research data (currently empty).
4. LLM: Generate Idea & Caption (GPT-4.1) (Language Model, OpenAI) — The actual LLM call used by the agent. Uses model gpt-4.1.
5. Parser: Extract JSON from Idea (Output Parser, No auth) — Parses the LLM output into a structured JSON object, enforcing the schema defined in the node.
6. Google Sheets: Save Script Idea (Google Sheets, OAuth2) — Appends the generated idea, caption, environment prompt, and status to a new row in a Google Sheet. Requires a Google Sheets credential and a configured sheet/document.
7. AI Agent: Create Veo3-Compatible Prompt (LangChain Agent, OpenAI) — Takes the saved idea and environment, and asks GPT-4.1 to format a detailed, cinematic prompt suitable for Google Veo3. The system prompt enforces a strict structure (scene, character, dialogue, action, technical details).
8. Tool: Build Prompt Structure (Tool, No auth) — Placeholder for potential future enhancements.
9. LLM: Format Prompt for Veo3 (GPT-4.1) (Language Model, OpenAI) — The underlying LLM call for prompt generation.
10. Call Veo3 API to Generate Video (HTTP Request, Header Auth) — Sends the Veo3 prompt as JSON to https://queue.fal.run/fal-ai/veo3 using a POST method. Authentication uses a generic HTTP Header credential (e.g., a Fal.ai API key passed in the Authorization header or similar). Expects a request ID in the response.
11. Wait for Veo3 Processing (5 mins) (Wait, No auth) — Pauses execution for 5 minutes to allow Veo3 to generate the video. You may need to adjust this delay based on actual queue times.
12. Retrieve Final Video URL from Veo3 (HTTP Request, Header Auth) — Polls the Veo3 status endpoint (/requests/{{request_id}}) with the same header auth to get the final video URL.
13. Google Sheets: Log Final Video Output (Google Sheets, OAuth2) — Updates the row in the same sheet (matched by idea) with the generated video URL and marks production as "done".
14. Get my video (Google Sheets, OAuth2) — Reads the video metadata from the sheet (URL, description, title, etc.) for later posting. This node expects the sheet to have specific column headers (e.g., final_output, DESCRIPTION, Titre).
15. Assign Social Media IDs (Set, No auth) — Outputs a static JSON object containing placeholder social media account IDs (e.g., instagram_id: "1111"). These must be replaced with real IDs from your Blotato account.
16. Upload Video to Blotato (HTTP Request, Header Auth) — Uploads the video to Blotato's media API (https://backend.blotato.com/v2/media) using the URL from the sheet. Requires a personal blotato-api-key header.
17. INSTAGRAM, YOUTUBE, TIKTOK, FACEBOOK, THREADS, TWITTER, LINKEDIN, BLUESKY, PINTEREST (HTTP Request, Header Auth) — Each node posts the video to the respective platform via Blotato's /v2/posts endpoint. They include the uploaded media URL and the description from the sheet. Different platforms have additional parameters (e.g., YouTube title, TikTok privacy settings). All require the same Blotato API key.
18. Google Sheets (Google Sheets, OAuth2) — Finally, updates the sheet with a "Publish" status and row number, marking successful publication.

Setup Instructions

• Google Sheets: You need a Google Cloud project with the Sheets API enabled. Create an OAuth2 credential in n8n for Google Sheets and grant access to the spreadsheet you will use. The sheet must have columns: id, idea, caption, production, environment_prompt, final_output, DESCRIPTION, Titre, URL VIDEO, STATUS, row_number. You can adjust column names in the nodes.
• OpenAI: Obtain an API key from OpenAI and create a credential in n8n of type "OpenAI". The workflow uses model gpt-4.1; ensure your account has access.
• Veo3 (Fal.ai): This workflow uses the Fal.ai queue API. You need a Fal.ai account, create an API key, and set up a Header Auth credential in n8n with the key (likely as Authorization: Key YOUR_API_KEY).
• Blotato: Sign up at Blotato, connect your social media accounts, and get your API key from settings. Create a Header Auth credential in n8n with header name blotato-api-key. Replace the placeholder social media IDs (1111) in the Assign Social Media IDs node with the actual account IDs from Blotato (found in the Blotato dashboard or API).
• Schedule: Configure the Schedule Trigger to run at your desired frequency (e.g., daily at 9 AM).

Use Cases & Variations

• Daily Content Machine: Set the schedule to run every morning, generating a fresh video idea and publishing across all your platforms automatically.
• Batch Creation: Modify the workflow to generate multiple ideas in one run (loop over the AI node or adjust the system prompt to output multiple concepts).
• Topic Injection: Change the hardcoded topic ("a Yeti speaking to a camera…") to a dynamic input — for example, pull trending topics from an RSS feed or a Google Sheet column.
• Platform Filtering: Remove nodes for platforms you don’t use, or add conditional logic to skip certain posts.
• Human Review: Insert a manual approval step before posting (e.g., using a webhook or an n8n manual trigger).
• Analytics: Add nodes to fetch engagement metrics from Blotato after posting and log them back to the sheet.

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