The old saying that a picture is worth a thousand words has never been truer than in the app store. Apart from your icon, your screenshots are the only other visual the user has to make their decision on downloading. Avoid wasting shots on loading screens and head right into showing your content and functionality. Put screenshots in sequence of what sets you apart first rather than trying to be true to the flow of the app. If your USP is video then put video first. And don’t bother with your loading screen, unless it is something really out of the box to showcase.