Do you have the where you found this, or are you seeing any errors when trying to open it?
: This indicates it is the first volume of a multi-part archive . You cannot fully extract the contents without having all subsequent parts (e.g., part2, part3, etc.) in the same folder.
: If the file asks you to download a specific "player" or "codec" to view the content, it is almost certainly a virus.
: Use software like WinRAR or 7-Zip .
: Files with randomized, obfuscated names from unofficial sources are high-risk. Always run a scan with Microsoft Defender or Malwarebytes before opening.