Print one QR on the box, forever. Update the manual link any time; route iOS to App Store, Android to Play, German users to the localized video.
Moving the setup video off YouTube? Change the link once — every box already in customers' hands updates instantly. Geo + OS routing layer on automatically: German shoppers get the German video, iPhone owners go straight to the App Store, the rest get the international web fallback.
Free tier includes 1 permanent QR and the recovery key — upgrade the slot with the exact modules this case uses whenever you need them.