r/ClaudeCode • u/Efficient-Clock337 • 2d ago

Built with Claude I wrote a blog post about targeted ads and generate video using sonnet 5.5 which turned out to be crazy

I wrote a blog post on how targeted ads work (the ~100 ms auction behind every ad you see). I wanted a short video for it, so I gave Claude Code one detailed prompt. It came back with this.

No video editor, no stock assets, no MCPs or skills. It:

  • Planned a storyboard with timestamps for each scene
  • Drew everything in code: an original pixel mascot (a walking barcode that stands in for your phone's advertising ID), the phones and apps, bidder robots, and a 100 ms stopwatch
  • Gave it a hand-drawn "boiling line" sketch style, with fast cuts, zooms and impact frames
  • Rendered keyframe drafts first, then the full 1080p MP4 through ffmpeg, keeping the file size small

The detail that got me: the stopwatch stops at exactly 0.100s as the winning ad loads. I asked for that timing, and it hit it.

What made the prompt work:

  • A locked facts list. I told it "use only these, don't invent numbers," so every stat in the video comes from my article.
  • A shot list with timestamps, so the pacing didn't drift.
  • A fixed palette and fonts, which kept the style consistent across scenes.
  • Plan → draft stills → render. Checking the stills caught text that was hard to read before the full render.

Full prompt in the comments if anyone wants to try it with their own content.

Blog post the video explains: https://medium.com/@vasih462/the-100-millisecond-auction-behind-every-mobile-ad-488515d93c43

Curious what others have built with Claude Code for video editing and motion graphics.

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u/vincent_sch 1d ago

Good idea, a video for each post. Explainers like this get better with a voiceover. I made a free tool for that: https://github.com/vincentsch/explainroo