This mod is not an official creation of Samsung; it has been made by XDA-Developers forums user under the nickname zeroprobe. Its goal is to improve the quality of pictures and videos caught with Galaxy S9 camera. It does so by:

– increasing bitrate of the movies by 30%,
– upgrading pictures’ parameters as well as automatic picture sharpness adjustments,
– removing the size limit of recorded videos.

Interested? App can be downloaded from here. It will only work on Galaxy S9 series devices with Exynos CPU.