This app shows and plays 8K videos. However, since the iPhone and iPad cannot play original 8K videos in full resolution, the videos are scaled down a bit, but played in maximum quality. You can also send yourself the download link and download the videos in their original resolution on a PC or Mac and play them on an 8K television, for example. The videos were either recorded with a real 8K camera or were upscaled from 4K and improved in quality with special software. Aquarium, Nature, Relax..