An app review is a comparison, not a first impression. Somebody asked for a specific thing, and the reviewer's job is to check whether the build delivers it. That changes what the walkthrough needs to do. It is not selling the build. It is answering a question that was already asked, as directly as possible, so the reviewer can approve, request a change, or escalate without having to hunt through the interface themselves. Treat the request as the script, and treat the video as evidence, not persuasion.
A Figma Make build usually lives at a shareable preview link that opens without a login, since most Figma Make projects are prototypes rather than shipped software with a real account system behind them. That means the reviewer could, in principle, go open the link and check it themselves. In practice they rarely have the time, which is exactly why a targeted walkthrough saves a review cycle instead of adding one. A queue of review requests moves faster when each one comes with a two minute answer attached instead of a bare link the reviewer has to schedule time to explore.
