Generate YouTube SEO descriptions, chapters, and tags with WayinVideo and GPT-4o-mini

Description

Submit any YouTube video URL along with your video title, channel name, niche, focus keyword, and a section query for timestamps and the workflow runs two AI processes simultaneously. WayinVideo's Summarization API and Find Moments API both start at the same time — one generating a structured video summary and the other finding chapter transition moments — each with its own independent polling loop. Once both complete, a merge step combines everything and GPT-4o-mini writes a complete YouTube SEO package in one call: an 800–1000 character description with chapters embedded, a standalone chapter list, 15 keyword tags, 6 hashtags, the above-the-fold hook, and SEO notes. Everything is saved to Google Sheets as one row — Status set to Ready — ready to paste directly into YouTube Studio. Built for YouTube creators, video agencies, and content managers who publish regularly and want a complete SEO package generated automatically without writing descriptions manually after every upload.

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What This Workflow Does

- Runs Summarization and Find Moments APIs simultaneously — Both [WayinVideo](https://wayin.ai/api/) APIs start at the same time from the form submission — not sequentially — so the total processing time is the same as running one - Uses two independent polling loops — Each API has its own 90-second initial wait and 30-second retry loop — neither blocks the other if one takes longer to complete - Sorts chapters chronologically and prepends 0:00 Introduction — All found moments are sorted by start time and a 0:00 Introduction line is added automatically if the first moment does not start at the beginning - Generates a full YouTube description with chapters embedded — The description follows YouTube best practices: focus keyword in the first 100 characters, hook above the fold, bullet points of what viewers will learn, chapters embedded in the body - Produces exactly 15 keyword tags and 6 hashtags — The tag list mixes exact keyword, broad niche, long-tail, and channel-related terms; hashtags include the focus keyword, niche, and discovery hashtags - Saves the above-the-fold hook separately — The first two lines of the description are extracted and saved in their own column so you can check the preview without opening the full description - Tracks description character count and tag count — Both are logged in the sheet so you can verify against YouTube's limits before publishing

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Setup Requirements

Tools Needed - n8n instance (self-hosted or cloud) - WayinVideo account with API access - OpenAI account with GPT-4o-mini API access - Google Sheets (one sheet with a tab named YouTube SEO)