: The .rar extension indicates a WinRAR or 7-Zip compressed file. The part1 designation means this is a "split archive"; you will need all subsequent parts (part2, part3, etc.) in the same folder to extract the contents successfully.
Standard installations of Mortal Kombat 11 often use 1080p pre-rendered cinematics to save on initial download sizes. This "Update Movies 4K" package is a modular add-on designed for players who want to leverage 4K monitors and high-end GPUs for a more seamless visual transition between gameplay and story sequences. Technical Details Mortal.Kombat.11.Update.Movies.4K.part1.rar
Note: It is highly recommended to back up your original "Movies" folder before overwriting files. Mortal.Kombat.11.Update.Movies.4K.part1.rar