[jjcm]

For which segment? The top one is just three vids I took of different builds I had, the lower ones which show the UI actually working are pure html/js/css. Some elements of them are actually interactive - ie you can switch the options in the first walkthrough demo.

For each of them I just told an agent to extract the actual working app logic into a narrower / more rigid flow that automatically does each step, and to animate the cursor.