Instagram Trial Reels Automation (n8n) w/ Gemini & Veo 3.1

Generate Instagram Trial Reels at Scale—From Idea to 9:16 Video with n8n, Gemini, and Veo 3.1

This n8n workflow turns an Instagram Reel video idea submitted via an n8n form into multiple hook variants using Google Gemini, renders short vertical clips with Veo 3.1, then uploads and creates trial reels on Instagram through PostWire—while logging results to Google Sheets and emailing failures via Gmail.

What this workflow does

• Collects input from an n8n form: video idea, target audience, and the number of variants to test.
• Generates multiple opening-hook variants using Google Gemini, returning JSON that includes: a hook, angle, a Veo prompt, and an Instagram caption.
• Splits and processes each variant into individual items for automated testing.
• Creates an 8-second 9:16 clip per variant using Veo 3.1, then requests an upload URL from PostWire.
• Uploads and finalizes media via PostWire to obtain a hosted media URL.
• Publishes an Instagram Reel as a trial reel using the PostWire API, with an idempotency key to prevent duplicate posts for the same test and variant.
• Tracks outcomes by appending rows to Google Sheets (idea, variant, hook, status, link).
• Handles errors automatically: on publish failure, it logs a “needs fix” row to Google Sheets and sends a Gmail email with the error and suggested fix details.

Use cases

• Run hook testing campaigns for SaaS onboarding, product features, or founder-led content—without manual reel creation.
• Automation engineers need an end-to-end Instagram trial-reel pipeline with reliable logging and failure alerts.
• Marketers and operators validate which opening hook drives engagement before committing to production posts.

Technical details

• n8n nodes: form trigger, if, set, split out, sticky note, gmail.
• Integrations: Google Gemini, Veo 3.1, PostWire (via HTTP Header Auth using Authorization: Bearer <your PostWire API key>), Google Sheets, Gmail.
• Instagram posting: PostWire API with trial-reel enabled and idempotency protection.