In an era of 4K streaming, why does a version exist?
Understanding Korean Movie File Formats: 576p, WEBRip, x264 and 2020 Releases Explained
This refers to the vertical resolution. While 1080p (Full HD) is the standard today, 576p is the PAL equivalent of Standard Definition (SD). It offers a clear picture that is much better than old VHS tapes but requires less storage space and bandwidth than 4K or HD files.