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Automate UGC video creation with Gemini and Google Veo 3 & upload to Instagram via Postiz

DavideDavide
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2/3/2026
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πŸŽ₯πŸ€– This workflow automates the creation and publishing of UGC (User-Generated Content) videos using Google Gemini and Google Veo 3, then uploads them directly to Instagram with Postiz.

Advantages

  • βœ… Full Automation – Eliminates manual video editing, caption writing, and uploading.
  • βœ… High-Quality UGC Videos – Leverages Google Veo 3 for professional ad-like video generation.
  • βœ… AI-Powered Creativity – Uses Google Gemini for both creative direction and social media copywriting.
  • βœ… Time-Saving – From image to published Instagram post in a single automated flow.
  • βœ… Consistency – Ensures branding and messaging remain aligned across campaigns.
  • βœ… Scalability – Can easily generate multiple UGC ads for different products.
  • βœ… Centralized Management – Stores videos in Google Drive and distributes them via Postiz.

How It Works

  1. Image Analysis & Creative Briefing: The workflow starts with a predefined product image. This image is analyzed by Google Gemini, which acts as a "Creative Director" to generate a detailed, cinematic prompt describing an 8-second commercial scene based on the image's content.

  2. Parallel AI Task Execution: The creative director's prompt is then sent to two different AI agents simultaneously:

    • Video Generation: One agent uses the prompt with Google Veo 3 to generate the actual video file, visualizing the described scene.
    • Copywriting: The other agent, acting as a "Social Media Manager," uses the same prompt to generate compelling caption copy tailored for an Instagram audience.

  3. Asset Distribution & Publishing: The generated video is uploaded to two destinations: Google Drive for storage and the Postiz API for social media management. The AI-generated caption is prepared. Finally, all data (video information from Postiz and the caption) is merged and sent to the Postiz node, which schedules and publishes the video as a post to the connected Instagram account.

Set Up Steps

To use this workflow, you need to configure the following credentials and node settings in n8n:

  1. Image Source: In the "Set image" node, replace the default image_url value with the URL of your own product image.

  2. Google Gemini Credentials: The workflow uses three Gemini nodes. Ensure your Google Gemini API credentials (named "Google Gemini(PaLM) (Eure)" in this example) are correctly set up and have access to the specified models (gemini-2.5-pro and veo-3.0-generate-preview).

  3. Google Drive Credentials: Configure the "Upload video" node with valid Google Drive OAuth credentials. Update the folderId parameter if you wish to save the generated videos to a different folder in your Drive.

  4. Postiz Credentials: The "Upload Video to Postiz" and "Instagram" nodes require valid credentials for the Postiz API. You must have an active Postiz account and have connected your Instagram business account to it within the Postiz platform.

  5. Postiz Integration ID: In the "Instagram" node, the integrationId field is specific to a connected social account within a Postiz account. You must replace this value with your own Instagram integration ID from Postiz.

  6. (Optional) Video Parameters: You can adjust the video generation aspect ratio (e.g., 9:16 for Stories/Reels) in the options of the "Generate UGC Video" node.

Need help customizing?

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Automate UGC Video Creation with Gemini and Google Veo 3, Upload to Instagram via Postiz

This n8n workflow automates the creation of user-generated content (UGC) videos using Google Gemini and Google Veo 3, then uploads the generated video to Instagram via the Postiz API. It streamlines the process from a manual trigger to a published Instagram post.

What it does

This workflow performs the following key steps:

  1. Manual Trigger: Initiates the workflow upon manual execution.
  2. Google Gemini: Generates content (likely video script or prompt) using the Google Gemini AI model.
  3. HTTP Request (Google Veo 3): Sends a request to the Google Veo 3 API to generate a video based on the content from Gemini.
  4. Edit Fields (Set): Prepares the data for the next step, likely extracting the video URL or other relevant information.
  5. HTTP Request (Postiz Upload): Uploads the generated video to Postiz, a platform for scheduling and publishing social media content.
  6. Merge: Combines data from previous steps, ensuring all necessary information is available for the final Instagram post.
  7. HTTP Request (Postiz Post): Publishes the video to Instagram via the Postiz API.
  8. Google Drive: (Optional/Placeholder) This node is present but not connected, suggesting a potential future enhancement to save the generated video or related data to Google Drive.
  9. Sticky Note: Provides a comment for documentation within the workflow.

Prerequisites/Requirements

To use this workflow, you will need:

  • n8n Instance: A running n8n instance.
  • Google Gemini API Key: Credentials for accessing the Google Gemini AI model.
  • Google Veo 3 API Access: Access and credentials for the Google Veo 3 video generation API.
  • Postiz Account: An account with Postiz to manage Instagram uploads, including an API key or access token.
  • Instagram Account: An Instagram account connected to your Postiz account for publishing.
  • Google Drive Account (Optional): If you intend to connect the Google Drive node in the future.

Setup/Usage

  1. Import the Workflow: Import the provided JSON into your n8n instance.
  2. Configure Credentials:
    • Set up your Google Gemini credentials.
    • Configure the HTTP Request (Google Veo 3) node with your Google Veo 3 API endpoint and any required authentication (e.g., API key, OAuth).
    • Configure the HTTP Request (Postiz Upload) and HTTP Request (Postiz Post) nodes with your Postiz API endpoint and authentication details.
    • (Optional) If you plan to use the Google Drive node, configure its credentials.
  3. Review Node Configurations:
    • Examine the "Google Gemini" node to ensure the prompt for video content generation is as desired.
    • Verify the URLs and body structures in the "HTTP Request (Google Veo 3)" and "HTTP Request (Postiz Upload/Post)" nodes match the respective API documentation.
    • Adjust the "Edit Fields (Set)" node if specific data transformations or extractions are needed for your use case.
  4. Activate the Workflow: Once configured, activate the workflow.
  5. Execute: Click the "Execute workflow" button on the "Manual Trigger" node to run the workflow. The workflow will then proceed to generate a video and attempt to upload it to Instagram.

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