Auto-Post New YouTube Videos to X (Twitter) with AI-Generated Posts

Overview

This workflow automatically monitors a YouTube channel for new video uploads and posts an AI-generated promotional message to X (formerly Twitter) for each new video. It runs every 30 minutes, checks for videos published in the last 30 minutes, generates a concise, engaging post using OpenAI's GPT-3.5 Turbo, and publishes it directly to X. This is ideal for content creators, marketers, or anyone who wants to cross-promote their YouTube content on X without manual effort.

How It Works

Node-by-Node Breakdown

1. Check Every 30 Min (Schedule Trigger) — No auth

   • Runs the workflow every 30 minutes on a recurring interval.
   • Configured with a 30-minute interval, so it checks for new videos frequently.

2. Fetch Latest Videos (YouTube Node) — OAuth2 (Google/YouTube)

   • Queries the YouTube Data API for the latest video from a specific channel.
   • Parameters:
     • limit: 1 (fetches only the most recent video)
     • filters.channelId: The YouTube channel ID to monitor (set to a default channel, but you must replace with your own)
     • filters.publishedAfter: Dynamically calculates a timestamp 30 minutes before the current time, so only videos published in the last 30 minutes are returned.
   • Returns video metadata including title, description, and video ID.

3. Generate Post for X with ChatGPT (OpenAI Node) — API Key auth (OpenAI)

   • Uses OpenAI's GPT-3.5 Turbo model to generate a promotional tweet.
   • Parameters:
     • modelId: gpt-3.5-turbo
     • messages: A single system message with a prompt that instructs the AI to write an engaging post of no more than 140 characters, including a link to the video (https://youtu.be/{{ $json.id.videoId }}) and using the video's title and description from the previous node.
   • Outputs the generated text in message.content.

4. Post to X (Twitter Node) — OAuth2 (X/Twitter)

   • Posts the generated message to X (Twitter).
   • Parameters:
     • text: Uses the AI-generated content from the previous node (={{ $json.message.content }})
     • additionalFields: Empty (no extra options like media or reply settings).

Setup Instructions

Prerequisites

1. YouTube Channel ID: You need the Channel ID of the YouTube channel you want to monitor. Find it by going to YouTube Advanced Settings while logged into the channel.
2. Google/YouTube OAuth2 Credentials: Create OAuth2 credentials in the Google Cloud Console with the YouTube Data API v3 enabled. Authorize the scope https://www.googleapis.com/auth/youtube.readonly.
3. OpenAI API Key: Sign up at OpenAI and generate an API key. Ensure you have billing enabled.
4. X (Twitter) OAuth2 Credentials: Create a developer account at X Developer Portal, create a project, and generate OAuth2 credentials (Client ID and Client Secret) with read and write permissions.

Configuration Steps

1. Replace the Channel ID: In the Fetch Latest Videos node, update the channelId field with your actual YouTube Channel ID.
2. Set up credentials:
   • For Fetch Latest Videos: Add a new Google OAuth2 credential and authorize it.
   • For Generate Post for X with ChatGPT: Add an OpenAI API credential with your API key.
   • For Post to X: Add an X OAuth2 credential and complete the OAuth flow.
3. Activate the workflow: Toggle the workflow to active. It will start checking every 30 minutes.

Use Cases & Variations

• Content Promotion: Automatically promote every new YouTube video to X, saving time and ensuring consistent cross-platform sharing.
• Custom AI Prompts: Modify the prompt in the OpenAI node to change the tone, include hashtags, or add calls-to-action.
• Multiple Channels: Duplicate the workflow for different YouTube channels by changing the Channel ID.
• Platform Variations: Replace the Post to X node with a Telegram, Slack, or Discord node to post to other platforms.
• Scheduling: Change the interval in the Check Every 30 Min node to run every hour, daily, or at specific times.
• Filtering: Add a Filter node after Fetch Latest Videos to only post videos with certain keywords in the title or description.

{
  "id": "O9FXr8iXzhSgYKaL",
  "meta": {
    "instanceId": "d8bbc8c5a59875a8be9f3c7142d858bc46c4b8e36a11781a25e945fcf9a5767a"
  },
  "name": "Post New YouTube Videos to X",
  "tags": [],
  "nodes": [
    {
      "id": "576be5c4-1ed0-4d01-a980-cb2fc31e2223",
      "name": "Post to X",
      "type": "n8n-nodes-base.twitter",
      "position": [
        1280,
        380
      ],
      "parameters": {
        "text": "={{ $json.message.content }}",
        "additionalFields": {}
      },
      "credentials": {
        "twitterOAuth2Api": {
          "id": "FjHOuF0APzoMqIjG",
          "name": "X account"
        }
      },
      "typeVersion": 2
    },
    {
      "id": "3b87cf2a-51d5-4589-9729-bb1fe3cfceca",
      "name": "Sticky Note",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        620,
        254.76543209876536
      ],
      "parameters": {
        "color": 3,
        "width": 221.82716049382665,
        "height": 308.7901234567902,
        "content": "🆔 Ensure you enter your YouTube Channel ID in the \"Channel ID\" field of this node. You can find your [Channel ID here](https://youtube.com/account_advanced)."
      },
      "typeVersion": 1
    },
    {
      "id": "912e631c-aa43-4e02-9816-b35fe6e62dd8",
      "name": "Generate Post for X with ChatGPT",
      "type": "@n8n/n8n-nodes-langchain.openAi",
      "position": [
        900,
// ... truncated (copy to see full JSON)