Fully automated product demo videos: local LLMs, 34 episodes, zero human editing

Ok_Cartographer_6086 · reddit · 2026-09-07

A developer shares his fully automated pipeline for producing weekly software demo videos — 34 episodes so far, no human editing.

Pipeline

A 35B Qwen model as the workhorse plans video "beats" (5s hook, 30s problem statement) into a YAML file with timings, agent notes and dialog
The agent spins up a sandboxed virtual LAN with as many servers as needed, loads the real Linux desktop app in memory and records the screen
ElevenLabs handles speech, with hashed caching so identical text is never regenerated; a RAG built on 20 years of the author's emails, code and blogs keeps the tone personal
An MCP service drives the live app; the pipeline adds infographics, animations, highlights, etc.

The quality feedback loop

When production hits a real bug, an off pixel, or a missing MCP capability, the agent files a GitHub issue via PAT, triggering a dev agent on another server
The dev agent opens a PR; a local QA agent checks out the branch, verifies the fix, approves and auto-merges to staging; production restarts with new code and loops until done

The author reviews 4-5 takes per video and re-runs videos whenever the app's UX changes. Side benefits: free end-to-end tests on every run, and production scripts that improve weekly. Full steps are listed in his YouTube video.

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Fully automated product demo videos: local LLMs, 34 episodes, zero human editing

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