Automated Short Video Production Workflow

Note: Service names, images, and figures in this case study have been replaced with fictional equivalents for portfolio purposes. They differ from the actual project.

Project Overview

We built an n8n workflow that fully automates the short-form video pipeline—from sourcing international trending content to script creation, AI video generation, and publishing across multiple platforms.

Client Challenges

• Each short video took 2–3 hours to produce, making volume production impractical
• Adapting international trends into Japanese content was person-dependent
• Limited video editing staff created bottlenecks
• Manual uploads to YouTube, TikTok, and Instagram were tedious

Solution

Automated Trend Sourcing

• Automatic collection of trending topics from major international media via RSS/API
• LLM-powered relevance scoring for the Japanese market, with top topics auto-selected

Automated Script Generation

• LLM generates sub-60-second short video scripts from selected topics
• Structured as hook (first 3 seconds), main content, and CTA

HeyGen Video Generation

• Scripts sent to HeyGen API for avatar-based video generation
• Automatic subtitles and background music

Multi-Platform Auto-Publishing

• Automatic upload to YouTube Shorts, TikTok, and Instagram Reels
• Platform-optimized titles and hashtags generated automatically

Results

• Production time reduced from 3 hours to 15 min (including review) per video
• Monthly content output increased from 4 to 30+ videos
• No specialized video editing skills required for operation

Timeline

Approx. 4 weeks