How code-drawn explainer videos are made, and how to make better ones.

Two ways to make video with AI. Models like Opus 5.5 write code that draws every frame; video models generate pixels. What each is good at, and which to use for an explainer.

A practical guide to explainer video length, with the number of spoken words that fit in 15, 30, 45 and 60 seconds, and what each length can hold.

Claude Opus 5.5 has no video output, yet its videos took over X in October. Here is what actually happens between the prompt and the MP4, step by step.

Hundreds of Opus 5.5 videos come from variants of one viral prompt, and it shows. What the prompt gets right, why the results converge, and how to write a brief instead.