You cannot open part .002 on its own. To view the content, you need the full set:
Right-click on the first part (.001) and select "Extract Here." Mia-FD-Mia-015a.mp4.7z.002
This is the second part of a split archive. Large files are often broken into smaller chunks (like .001, .002, .003) to bypass upload limits on cloud storage or email. How to Open It You cannot open part
If the file doesn't open, ensure the file sizes are consistent with the source; sometimes downloads get interrupted, requiring a re-download of that specific part. Do you have the other parts of this archive, or sometimes downloads get interrupted
The video has been compressed using 7-Zip to save space or make it easier to transfer.