The term "KXSD" combined with a number ("EP1453") usually refers to file naming conventions in private collections, specific online content platforms, or perhaps a localized digital archive.
If you can provide the where you saw this title, or what kind of video it is (e.g., educational, music, entertainment), I might be able to help you find it. Download Hui JiaKXSD EP1453 mp4
Based on my search, there is no publicly available academic paper, news article, or official documentation related to a file named "." The term "KXSD" combined with a number ("EP1453")