Turn YouTube videos into weekly short clips with captions using WayinVideo and GPT-4o-mini

Description

Add your old YouTube video URLs to a Google Sheet once and every Monday at 9AM the workflow automatically processes each one end to end. [WayinVideo](https://wayin.ai/api/) runs two sequential APIs — first Summarization to extract structured highlights and tags, then AI Clipping to produce up to 3 viral short-form clips with 9:16 reframe, animated captions, and HD quality. GPT-4o-mini then writes platform-specific captions for TikTok, Facebook, and LinkedIn for each clip. Every clip is downloaded from WayinVideo and uploaded to Google Drive before the export link expires, all captions and Drive links are saved to a Content Calendar sheet, and the video row is marked Processed. Built for content creators, social media managers, and agencies who want to automatically repurpose their existing video library into short-form content every week without touching a single tool.

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What This Workflow Does

- Runs two WayinVideo APIs per video sequentially — First Summarization extracts structured highlights and tags, then AI Clipping produces up to 3 vertical clips with 9:16 reframe and animated captions - Writes three platform captions per clip — GPT-4o-mini produces a TikTok caption (max 150 characters), a Facebook post (100–200 words), and a LinkedIn post (150–250 words) for every clip - Downloads clips before export links expire — Each clip is downloaded from WayinVideo immediately and uploaded to Google Drive so you never lose access - Logs 16 fields per clip to the Content Calendar sheet — Video summary, clip title, score, timestamp, WayinVideo export link, Google Drive link, all three captions, hashtags, and status are all saved in one row - Marks each video as Processed automatically — After all clips are saved, the Video List row is updated with Processed status and today's date so it is never processed again - Runs two independent retry loops — One loop handles summarization polling, another handles clipping polling — each retrying every 30 seconds independently until SUCCEEDED - Processes all pending videos every Monday — Every video in the sheet with a pending status is picked up and run through the full pipeline in one automated weekly run

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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 (two tabs: Video List and Content Calendar) - Google Drive (one folder for clips)