My video has unit tests

David Pertiller used AI to create a 15-second promotional video for his app by writing code instead of using traditional video editing software. The video is generated by a JavaScript function that renders each frame as an SVG based on time input, allowing him to describe changes in plain language, test timing logic with unit tests, and easily modify elements like animations, translations, and transitions by editing the source code. The interactive demo lets viewers drag through the video in their browser, which runs the same renderer to generate frames on demand rather than playing a pre-rendered file.