Remotion is an open-source framework that lets you create videos using React code instead of dragging clips around in a timeline editor.

You write components that define what appears at each frame, then Remotion renders them into MP4s, GIFs, or other formats. Think of it as "React for video" - everything from text animations to data visualizations becomes reproducible code.

Builders use it to generate thousands of personalized videos, create dynamic social media content, or build entire video apps. It's particularly powerful for programmatic video generation where you need to create variations at scale. Works locally or deploys to AWS Lambda for cloud rendering.

Free and open source. Cloud rendering on Lambda costs around $0.05-0.20 per minute of rendered video depending on your settings.