How I Made a Polished Promo Video with Claude Code

A lot of you asked how I made the video in my last post for my app Onelog, so here's the full recipe. No video editor, no After Effects. Just Claude Code + a few tools (and some "no this is sh\*t try again pls" haha) : 1. Story first Before touching anything, I wrote a 40-second script with Claude: three promises (capture your life, keep it yours, put it to work) and one narrator, the orange dot from the logo. A clear story makes every later decision easy. 2. Film the real app, not mockups Claude drives the iOS simulator itself (via an MCP for Xcode): it launches the app with clean sample data, taps through the real UI and records the screen. What you see in the video is the actual app. 3. Let Claude find the timing Claude runs ffmpeg on the recording to detect every tap and screen change, down to the frame. Then it cuts the boring parts and speeds up the waits. No scrubbing through a timeline by hand. Also, for the sound effect : a royalty-free track with its…