: You use a program like WinRAR or 7-Zip . You only need to right-click the first file ( part01 ) and select "Extract." The software automatically pulls data from all the other parts to recreate the full 1080p video file.

: A file ending in .part01.rar is just the first segment of a larger puzzle. To open it, you need to have all the other parts (e.g., part02.rar , part03.rar , etc.) in the same folder.

If you tell me what you're trying to do with the file, I can help you troubleshoot the extraction or find a safer way to watch the movie.