Summarize YouTube videos in Slack using AssemblyAI transcription and OpenAI

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1. Workflow Overview

How it works This workflow lets users generate structured summaries from YouTube videos directly inside Slack using n8n, AssemblyAI, and OpenAI. When a user submits a YouTube link via a Slack sl...

Best for

Market Research automation workflows
AI Summarization automation workflows
advanced n8n builders looking for reusable templates

Tools used

n8n-nodes-base.code, n8n-nodes-base.httprequest, n8n-nodes-base.webhook, n8n-nodes-base.set, n8n-nodes-base.if, n8n-nodes-base.wait, @n8n/n8n-nodes-langchain.openai, 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 Marsel Bait.

Original n8n.io source

1.1 Workflow description

Title: Summarize YouTube videos in Slack using AssemblyAI transcription and OpenAI
Workflow name: Summarize YouTube videos in Slack using AssemblyAI transcription and OpenAI

🧠 How it works This workflow lets users generate structured summaries from YouTube videos directly inside Slack using n8n, AssemblyAI, and OpenAI.

When a user submits a YouTube link via a Slack slash command, the workflow extracts the video ID and validates the video duration. Videos longer than the supported limit are stopped early with a clear message sent back to Slack.

For valid videos, the workflow downloads the video audio as an MP3 file and sends it to AssemblyAI for transcription. Once the transcription is complete, the transcript is passed to an AI model to generate a structured summary.

The final result includes a concise TL;DR, key takeaways, and notable quotes, which are formatted and posted back to Slack asynchronously using the original response URL.

⚙️ Features • Triggers from a Slack slash command with a YouTube link • Validates video length before processing (maximum 10 minutes) • Downloads YouTube audio as MP3 using RapidAPI • Transcribes audio using AssemblyAI • Generates structured summaries (TL;DR, key takeaways, notable quotes) • Posts the summarized result back to Slack asynchronously

💡 Use cases & expected outcomes • Educational YouTube videos → Receive a clear summary instead of watching the full video • Long-form talks or interviews → Quickly get key points and memorable quotes • Research and learning → Extract insights from videos without manual note-taking • Content discovery → Decide whether a video is worth watching based on its summary

In all cases, users receive a clear, structured summary of a YouTube video directly in Slack.

💡 Perfect for • Teams sharing YouTube links and wanting quick context • Researchers and learners reviewing long video content • Content creators analyzing videos efficiently

🧩 Notes • Please note that this workflow generates summaries, not full transcripts

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 - Validate Duration

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

Block 2 - Check Video Duration

Type / Role: n8n-nodes-base.httpRequest - httpRequest
Config choices: Version 4.3

Block 3 - Receive Slack command

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

Block 4 - Normalize Slack payload

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

Block 5 - Extract YouTube video ID

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

Block 6 - Is video longer than limit?

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

Block 7 - Send duration error to Slack

Type / Role: n8n-nodes-base.httpRequest - httpRequest
Config choices: Version 4.3

Block 8 - Convert YouTube video to MP3

Type / Role: n8n-nodes-base.httpRequest - httpRequest
Config choices: Version 4.2

Block 9 - Start transcription job

Type / Role: n8n-nodes-base.httpRequest - httpRequest
Config choices: Version 4.2

Block 10 - Submit audio for transcription

Type / Role: n8n-nodes-base.httpRequest - httpRequest
Config choices: Version 4.2

Block 11 - Wait for transcription processing

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

Block 12 - Check transcription status

Type / Role: n8n-nodes-base.httpRequest - httpRequest
Config choices: Version 4.2

Block 13 - Extract transcript text

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

Block 14 - Is transcription complete?

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

Block 15 - Generate AI summary

Type / Role: @n8n/n8n-nodes-langchain.openAi - openAi
Config choices: Version 1.8

Block 16 - Post result to Slack

Type / Role: n8n-nodes-base.httpRequest - httpRequest
Config choices: Version 4.2

Block 17 - Sticky Note16

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

Block 18 - Sticky Note18

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

Block 19 - Sticky Note19

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

Block 20 - Sticky Note

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

Block 21 - Sticky Note1

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

Block 22 - Sticky Note17

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

3. Summary Table

Workflow	Summarize YouTube videos in Slack using AssemblyAI transcription and OpenAI
Complexity	advanced
Nodes	22
Categories	Market Research, AI Summarization
Author	Marsel Bait
Published	23 Jan 2026

4. Reproducing the Workflow from Scratch

1. Download the workflow JSON

Use the JSON export at /data/workflows/12934/12934.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 Market Research workflows AI Summarization workflows

Frequently asked questions

What does Summarize YouTube videos in Slack using AssemblyAI transcription and OpenAI do?

How it works This workflow lets users generate structured summaries from YouTube videos directly inside Slack using n8n, AssemblyAI, and OpenAI. When a user submits a YouTube link via a Slack sl...

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 Market Research, AI Summarization use case.

Marsel Bait

2 workflows

Nodes

n8n-nodes-base.code n8n-nodes-base.httprequest n8n-nodes-base.webhook n8n-nodes-base.set n8n-nodes-base.if n8n-nodes-base.wait @n8n/n8n-nodes-langchain.openai n8n-nodes-base.stickynote

Complexity

advanced

Published 23 Jan 2026

Likes 0

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Install path: /data/workflows/12934/12934.json

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Summarize YouTube videos in Slack using AssemblyAI transcription and OpenAI

Workflow preview

1. Workflow Overview

Best for

Tools used

Source and attribution

1.1 Workflow description

1.2 Logical Blocks

2. Block-by-Block Analysis

Block 1 - Validate Duration

Block 2 - Check Video Duration

Block 3 - Receive Slack command

Block 4 - Normalize Slack payload

Block 5 - Extract YouTube video ID

Block 6 - Is video longer than limit?

Block 7 - Send duration error to Slack

Block 8 - Convert YouTube video to MP3

Block 9 - Start transcription job

Block 10 - Submit audio for transcription

Block 11 - Wait for transcription processing

Block 12 - Check transcription status

Block 13 - Extract transcript text

Block 14 - Is transcription complete?

Block 15 - Generate AI summary

Block 16 - Post result to Slack

Block 17 - Sticky Note16

Block 18 - Sticky Note18

Block 19 - Sticky Note19

Block 20 - Sticky Note

Block 21 - Sticky Note1

Block 22 - Sticky Note17

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