: Indicates it was released by a "peer-to-peer" sharing group.

Because this is a file and specifically labeled as part04 , you cannot open it or view the video on its own. To access the content:

The naming convention provides several technical details about the content: : Likely the title of the content (e.g., "Mypoli"). 2160p : Indicates 4K Ultra High Definition resolution.

: Once extracted, use a player that supports 4K HDR and HEVC, such as VLC Media Player or the HEVC Player from the Microsoft Store . HEVC Player - 4K HDR - Free download and install on Windows

Based on the filename , this is a specific segment of a high-definition video file distribution. File Name Breakdown