: This is the release group or the individual encoder who processed and uploaded the file. Release groups often add their tag to the end of the filename to claim credit for the quality or the rip.
While there is no single "official" movie titled exactly "S1nj4r," several acclaimed films cover this specific topic, which this file may contain: S1nj4r.m1080p.yamil.part5.rar
: This is the title of the content. Based on the spelling, it likely refers to the Kurdish/Yazidi region of Sinjar (often stylized with a '1' and 'j' in release titles). This suggests the content is likely a documentary or drama related to the 2014 Sinjar massacre or the conflict in that region. : This is the release group or the