n8n Workflow: Opus Clip to Airtable + Buffer for Reels

Turn long-form video URLs into ready-to-post Instagram Reels & TikToks—automatically

This n8n workflow finds “Todo” video ideas in Airtable, sends their long-form URLs to Opus Clip to generate short clips, uploads the finished videos to Cloudinary, and then publishes one Reel per slot to Instagram Reels and TikTok via Buffer.

What this workflow does

• Weekly (or manual trigger): searches up to two Airtable Concepts records with Status = Todo.
• Starts clip generation: marks each selected Concept as Processed and sends its Video URL to the Opus Clip API, creating a clip project with a webhook callback.
• Waits for completion: on Opus Clip’s completion callback, responds immediately and then waits one hour before continuing.
• Processes exportable clips: fetches exportable clips, filters out items without an export URL, and limits processing to 10 clips.
• Publishes-ready storage: downloads each clip, uploads it to Cloudinary to obtain a public video URL, and creates a new Airtable Content record (Title, Video URL, Status = Ready to Post).
• Daily posting runs: on two daily schedules, selects one random Ready-to-Post Airtable Content record and publishes it as an Instagram Reel and a TikTok post through Buffer.
• Prevents reposting: marks the Content record as Posted.

Use cases

• For SaaS operators who need consistent short-form output from a backlog of long-form videos.
• For automation engineers building an Airtable-to-clip pipeline with Opus Clip, Cloudinary hosting, and Buffer publishing.
• For marketers who want randomized daily posting to reduce manual scheduling effort.

Technical details

• Airtable: Concepts (Video URL, Status) and Content (Title, Video URL, Status).
• Opus Clip API: webhook-driven completion callback via an HTTP Header Auth credential.
• Cloudinary: uploads generated clips to produce public video URLs.
• Buffer: publishes to Instagram Reels and TikTok.
• n8n nodes (workflow flow): no op, sort, wait, limit, filter, webhook.