Promote YouTube videos on Reddit with AI-generated comments and email digest

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Important notice

This workflow is provided as-is. Please review and test before using in production.

1. Workflow Overview

Motivation Are you a small YT channel looking to grow to 1000 subs ? This workflow has helped me grow to 80 subs via Reddit Marketing. Check out the YT Tutorial. Wha...

Best for

Social Media automation workflows
Multimodal AI automation workflows
advanced n8n builders looking for reusable templates

Tools used

n8n-nodes-base.splitout, n8n-nodes-base.code, n8n-nodes-base.googlesheets, n8n-nodes-base.removeduplicates, n8n-nodes-base.formtrigger, n8n-nodes-base.if, n8n-nodes-base.gmail, n8n-nodes-base.stickynote

Source and attribution

This workflow is cataloged by N8N Workflows and links back to its original n8n.io source page by Ari Nakos.

Original n8n.io source

1.1 Workflow description

Title: Promote YouTube videos on Reddit with AI-generated comments and email digest
Workflow name: Promote YouTube videos on Reddit with AI-generated comments and email digest

Motivation

Are you a small YT channel looking to grow to 1000 subs ? This workflow has helped me grow to 80 subs via Reddit Marketing. Check out the YT Tutorial.

What it is

This n8n workflow automates the process of promoting your YouTube videos on Reddit. It identifies relevant Reddit posts, generates humanized comments tailored to your video content, and delivers a weekly digest of opportunities directly to your inbox.

How It Works

A user submits their YouTube video URL and email through a form.

The workflow analyzes the YouTube video's title, description, and tags to extract relevant keywords and create a custom AI classification prompt.

It searches Reddit for posts containing those keywords and filters them based on engagement metrics

upvotes > 15
non-empty text content
posted within the last 14 days
upvote ratio > 0.95

An AI agent (using OpenRouter's GPT-4.1-mini) classifies each filtered Reddit post to determine its relevance to your YouTube video.

For relevant posts, another AI agent (using OpenRouter's Gemini-2.0-flash-lite-001) generates a humanized, authentic comment designed to subtly reference your video and add value to the Reddit discussion.

Relevant posts and their proposed comments are stored in Google Sheets.

A professional HTML email digest is generated, summarizing the marketing opportunities.

The email is sent to the user's provided email address.

Setup

To run this workflow, you need to set up credentials in n8n for:

YouTube: Uses OAuth 2.0. Connect by authenticating your YouTube account.
Reddit: Uses OAuth 2.0. Requires creating an app on Reddit to get a Client ID & Secret. (YT Tutorial)
OpenRouter: Generate API key from your OpenRouter account. (YT Tutorial)
Google Sheets: Recommend OAuth2 - just connect by authenticating.
Gmail: Recommend OAuth 2.0. like Google Sheets

n8n account setup

If you do not have a n8n account, follow the YT Tutorial to get started.

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 1 - Split Out

Type / Role: n8n-nodes-base.splitOut - splitOut
Config choices: Version 1

Block 2 - Generate Email HTML

Type / Role: n8n-nodes-base.code - code
Config choices: Version 2

Block 3 - Append Data

Type / Role: n8n-nodes-base.googleSheets - googleSheets
Config choices: Version 4.5

Block 4 - Remove Duplicates

Type / Role: n8n-nodes-base.removeDuplicates - removeDuplicates
Config choices: Version 2

Block 5 - Form

Type / Role: n8n-nodes-base.formTrigger - formTrigger
Config choices: Version 2.2

Block 6 - Filter Posts by Criteria

Type / Role: n8n-nodes-base.if - if
Config choices: Version 2.2

Block 7 - Send to your email

Type / Role: n8n-nodes-base.gmail - gmail
Config choices: Version 2.1

Block 8 - Sticky Note4

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 9 - Sticky Note5

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 10 - Sticky Note6

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 11 - Structured Output

Type / Role: @n8n/n8n-nodes-langchain.outputParserStructured - outputParserStructured
Config choices: Version 1.2

Block 12 - AI Brain

Type / Role: @n8n/n8n-nodes-langchain.lmChatOpenRouter - lmChatOpenRouter
Config choices: Version 1

Block 13 - Reddit

Type / Role: n8n-nodes-base.reddit - reddit
Config choices: Version 1

Block 14 - YouTube

Type / Role: n8n-nodes-base.youTube - youTube
Config choices: Version 1

Block 15 - YT Keyword Analyst

Type / Role: @n8n/n8n-nodes-langchain.agent - agent
Config choices: Version 1.9

Block 16 - Brain

Type / Role: @n8n/n8n-nodes-langchain.lmChatOpenRouter - lmChatOpenRouter
Config choices: Version 1

Block 17 - Keep Certain Fields

Type / Role: n8n-nodes-base.set - set
Config choices: Version 3.4

Block 18 - Loop Over Items

Type / Role: n8n-nodes-base.splitInBatches - splitInBatches
Config choices: Version 3

Block 19 - Wait 5 sec

Type / Role: n8n-nodes-base.wait - wait
Config choices: Version 1.1

Block 20 - Structured_Output

Type / Role: @n8n/n8n-nodes-langchain.outputParserStructured - outputParserStructured
Config choices: Version 1.2

Block 21 - Social Post Comment

Type / Role: @n8n/n8n-nodes-langchain.agent - agent
Config choices: Version 1.9

Block 22 - Store Humanized Comment

Type / Role: n8n-nodes-base.googleSheets - googleSheets
Config choices: Version 4.5

Block 23 - Sticky Note

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 24 - Brain1

Type / Role: @n8n/n8n-nodes-langchain.lmChatOpenRouter - lmChatOpenRouter
Config choices: Version 1

Showing the first 24 of 29 workflow blocks. Download the JSON for the full node graph.

3. Summary Table

Workflow	Promote YouTube videos on Reddit with AI-generated comments and email digest
Complexity	advanced
Nodes	29
Categories	Social Media, Multimodal AI
Author	Ari Nakos
Published	27 May 2025

4. Reproducing the Workflow from Scratch

1. Download the workflow JSON

Use the JSON export at /data/workflows/4433/4433.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.

Download workflow JSON Original n8n.io source Social Media workflows Multimodal AI workflows

Frequently asked questions

What does Promote YouTube videos on Reddit with AI-generated comments and email digest do?

Motivation Are you a small YT channel looking to grow to 1000 subs ? This workflow has helped me grow to 80 subs via Reddit Marketing. Check out the YT Tutorial. Wha...

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 Social Media, Multimodal AI use case.

Ari Nakos

10 workflows

Nodes

n8n-nodes-base.splitout n8n-nodes-base.code n8n-nodes-base.googlesheets n8n-nodes-base.removeduplicates n8n-nodes-base.formtrigger n8n-nodes-base.if n8n-nodes-base.gmail n8n-nodes-base.stickynote

Complexity

advanced

Published 27 May 2025

Likes 0

View on n8n.io Download Workflow

Install path: /data/workflows/4433/4433.json

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Promote YouTube videos on Reddit with AI-generated comments and email digest

Workflow preview

Important notice

1. Workflow Overview

Best for

Tools used

Source and attribution

1.1 Workflow description

Motivation

What it is

How It Works

Setup

n8n account setup

1.2 Logical Blocks

2. Block-by-Block Analysis

Block 1 - Split Out

Block 2 - Generate Email HTML

Block 3 - Append Data

Block 4 - Remove Duplicates

Block 5 - Form

Block 6 - Filter Posts by Criteria

Block 7 - Send to your email

Block 8 - Sticky Note4

Block 9 - Sticky Note5

Block 10 - Sticky Note6

Block 11 - Structured Output

Block 12 - AI Brain

Block 13 - Reddit

Block 14 - YouTube

Block 15 - YT Keyword Analyst

Block 16 - Brain

Block 17 - Keep Certain Fields

Block 18 - Loop Over Items

Block 19 - Wait 5 sec

Block 20 - Structured_Output

Block 21 - Social Post Comment

Block 22 - Store Humanized Comment

Block 23 - Sticky Note

Block 24 - Brain1

3. Summary Table

4. Reproducing the Workflow from Scratch

1. Download the workflow JSON

2. Import the template into n8n

3. Configure credentials and variables

4. Test with sample data

5. Activate and monitor

5. General Notes & Resources

Frequently asked questions