Whiteboard explainer

How it was made

FrameCall's Quality model made this video from one prompt, in one run, with no hand edits. The prompt, word for word:

A 24-second whiteboard explainer about compound interest for a personal finance YouTube channel. Black marker on a white board, strokes that wobble like a real marker and are led by the marker tip, no hand, and one green marker kept only for money that grows. Tell it as four ideas with one drawing each, and let each drawing turn into the next instead of starting fresh. First, a single coin is drawn and labeled '$100'. Second, a small green sprout grows out of the top of the coin and '+ interest' is written beside it. Third, the sprout's leaves turn into new coins that sprout leaves of their own, so the drawing grows into a whole tree of coins while a hand-lettered counter beside it ticks from 'Year 1' to 'Year 30'. Fourth, a big felt eraser sweeps across the board, wipes the tree away in one smeary pass and leaves a clean space where a chart draws itself: a straight grey line labeled 'saving' and a green curve labeled 'compounding' that bends up and away from it, with the gap between them hatched in green. End by writing 'Start early.' big under the chart, and hold the finished board completely still for the last 3 seconds. Write every word at a pace you could read along with, slower than the drawings go. Drawings simple and confident like a good teacher's, lots of white space, a slight push-in on each new idea, no clip art, no corner labels.