Auto-Generate Social Posts from YouTube via Dumpling AI

🧠 Automate Social Media Content Creation from YouTube Videos

This powerful workflow automatically generates platform-specific social media posts (Instagram, Facebook, LinkedIn) from YouTube videos. It takes a topic from a Google Sheet, searches for relevant YouTube videos using Dumpling AI, selects the best match with GPT-4o, fetches the transcript, and creates tailored posts with matching AI-generated images — all saved back to your Google Sheet. Perfect for content creators, social media managers, and marketers who want to repurpose YouTube content efficiently.

The workflow runs on a schedule, processes one topic at a time, and marks topics as completed to avoid duplication. It combines the power of Dumpling AI for YouTube search and image generation, OpenAI's GPT-4o for intelligent content selection and copywriting, and Google Sheets for data management.

📋 Node-by-Node Breakdown

1. Trigger Search Schedule (Schedule Trigger) — No auth required. Runs the workflow on a configurable interval (default: every hour). You can adjust the schedule in the node settings.

2. Get Unsearched Topic from Google Sheet (Google Sheets) — OAuth2 (Google Sheets). Reads the first unsearched topic from the "YouTube Topics" sheet. Uses a filter to find rows where "Searched?" column is empty, and returns only the first match.

3. Search YouTube via Dumpling AI (HTTP Request) — Header Auth (Dumpling AI API key). Sends a POST request to Dumpling AI's YouTube search endpoint with the topic as query. Returns video results matching the search term.

4. Filter + Sort YouTube Videos (Code) — No auth. Custom JavaScript that extracts video data from the API response, filters for video type, sorts by published date (newest first), and returns the 3 most recent videos.

5. Prepare Video List for AI (Aggregate) — No auth. Combines all video items into a single array for processing by the AI node.

6. Select Best Video with GPT-4o (OpenAI) — API Key auth (OpenAI). Uses GPT-4o to analyze the search results and select the most relevant video based on the original topic and current date. Returns the best match in structured JSON format.

7. Get Transcript (Dumpling AI) (HTTP Request) — Header Auth (Dumpling AI API key). Fetches the YouTube transcript for the selected video using Dumpling AI's transcript endpoint.

8. Generate Posts with GPT-4o (OpenAI) — API Key auth (OpenAI). Takes the transcript and generates three platform-specific posts (Instagram, Facebook, LinkedIn) with matching image prompts. Each post is tailored to the platform's style and audience.

9. Generate Instagram Image (Dumpling AI) (HTTP Request) — Header Auth (Dumpling AI API key). Creates an AI-generated image for the Instagram post using FLUX.1-pro model.

10. Generate Facebook Image (Dumpling AI) (HTTP Request) — Header Auth (Dumpling AI API key). Creates an AI-generated image for the Facebook post.

11. Generate LinkedIn Image (Dumpling AI) (HTTP Request) — Header Auth (Dumpling AI API key). Creates an AI-generated image for the LinkedIn post.

12. Format Instagram Post (Set) — No auth. Structures the Instagram post data with platform name, content text, and image URL.

13. Format Facebook Post (Set) — No auth. Structures the Facebook post data similarly.

14. Format LinkedIn Post (Set) — No auth. Structures the LinkedIn post data similarly.

15. Save Instagram Post to Sheet (Google Sheets) — OAuth2 (Google Sheets). Appends the formatted Instagram post to the "Social Media Post" sheet.

16. Save Facebook Post to Sheet (Google Sheets) — OAuth2 (Google Sheets). Appends the formatted Facebook post to the same sheet.

17. Save LinkedIn Post to Sheet (Google Sheets) — OAuth2 (Google Sheets). Appends the formatted LinkedIn post to the same sheet.

18. Merge Post Results (Merge) — No auth. Combines the three post results into a single output for the final update step.

19. Update Topic Status in Sheet (Google Sheets) — OAuth2 (Google Sheets). Marks the original topic as "Searched?" = "Yes" in the YouTube Topics sheet to prevent reprocessing.

🔧 Setup Instructions

Required Accounts & Credentials:

1. Google Account — For Google Sheets access. Create OAuth2 credentials in n8n for Google Sheets.
2. Dumpling AI Account — Sign up at app.dumplingai.com and get your API key. Add as Header Auth credential in n8n.
3. OpenAI Account — Get your API key from platform.openai.com. Add as API Key credential in n8n.

Required Google Sheets:

• YouTube Topics sheet with columns: Youtube Topics, Searched?
• Social Media Post sheet with columns: platform, Content, Image

💡 Use Cases & Variations

Primary Use Cases:

• Content repurposing for social media managers
• Automated content calendar creation
• YouTube-to-social-media content pipeline
• Brand consistency across platforms

Adaptation Ideas:

• Add more platforms (Twitter/X, TikTok, Pinterest)
• Schedule posts directly to social media using n8n integrations
• Add human review step before posting
• Use different AI models for image generation
• Add email newsletter content generation
• Include video thumbnail generation
• Add analytics tracking for post performance

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