: Use a program like WinRAR or 7-Zip to open the first part ( part01.rar ); the software will automatically join all the pieces back into a single video file.
: You must have every segment (part01 through the final part) in the same folder. Amst3rd4m.4K.yamil.part09.rar
To help you further, could you clarify if you are , having trouble extracting it , or looking for a download link ? : Use a program like WinRAR or 7-Zip