If you are looking to download the file for offline viewing, note that Prime Video allows downloads on mobile devices (Fire Tablets, iOS, Android), but 4K downloads are typically restricted to specific Amazon Fire tablets only; mobile phones usually download in 1080p or 720p.
Uploading videos in 2160p (4K resolution) can significantly enhance the viewing experience for your audience. With the increasing popularity of 4K displays and devices, it's becoming more important to create and share high-quality video content. upload s03 2160p