n8n AI Workflow: Generate 5 social captions Automatically When a new YouTube video goes live
This n8n + AI recipe watches for when a new YouTube video goes live and spins out five platform-ready captions. The result: a week of social captions from one post, completely hands-off.
- 1
Trigger when a new YouTube video goes live
A
YouTube Triggerstarts the workflow the moment a new YouTube video goes live. - 2
Hand it to the AI agent
An
AI Agentnode running Claude spins out five platform-ready captions. The prompt is pre-written and scoped to this one job so results stay consistent. - 3
Deliver the captions
The result is sent to Slack — instantly, no clicks needed.
- 4
Add a safety net (optional)
Insert an
IF/human-approval step before anything is published or emailed, so you stay in control until you trust the output.
Frequently asked questions
How much does the AI part cost to run?
Pennies. Each run sends a small amount of text to the model, so most teams spend a few dollars a month even at hundreds of runs. You set the model and can cap volume in n8n, so costs never surprise you.
Can I trust the AI to get the captions right?
The prompt is tightly scoped to one job and you can add a human-approval step in n8n before anything is sent or published. Start with review-mode for a week, and once you trust the output, switch it to fully automatic.
Does this need n8n Cloud or can I self-host?
Either works. The workflow is a standard n8n export, so you can run it on n8n Cloud or on your own self-hosted instance — you only connect your own app credentials.
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