: Many archives of this type are password-protected by the uploader. You will need to find the password on the website where you originally found the links.
: You need a program like WinRAR , 7-Zip (Windows), or The Unarchiver (Mac) to reassemble them.
Do you have all the of this file saved in the same folder?
This particular file is part of a "split archive," meaning the movie has been broken into multiple smaller pieces (parts) to make it easier to upload or download. To use this file, you must treat it as part of a set rather than a standalone video. How to Open and Use the File