FC2-PPV (Pay-Per-View), a section of the FC2 website where independent creators sell adult videos directly to consumers.
What (if any) are you seeing when trying to open the file? Do you have all the other parts of the archive downloaded? FC2-PPV-3292343-1-4K.part11.rar
Understanding File Naming Conventions: Decoding "FC2-PPV-3292343-1-4K.part11.rar" FC2-PPV (Pay-Per-View), a section of the FC2 website