OpenMontage + Antigravity: Windows setup and editing

This tutorial walks through OpenMontage setup on Windows and uses Google Antigravity to edit a talking-head clip. The presenter describes OpenMontage as an open source video production system with instruction files, production pipelines, Python tools and render engines. It does not include a language model: a separate coding assistant reads its instructions and directs the work.

The setup covers Python, Node.js and FFmpeg, then cloning the repository, creating and activating a Python environment, and installing the requirements. The supplied commands specify Python 3.12 and Node.js LTS. The presenter also installs the Remotion renderer and Piper for local voice generation, with ElevenLabs mentioned as a paid option.

The editing example compares a vague request for graphics with a prompt that asks the agent to read the motion skills catalog and propose registry blocks before proceeding. For the 31-second clip, the presenter requests motion graphics roughly every five seconds. The resulting implementation plan gives time ranges that can be reviewed and changed.

The presenter judges the second result an improvement and says the opening sequence required several revisions. Local processing does not make the entire workflow free: the stated zero-dollar media cost excludes language model API calls.