The filename Zero.Days.2016.720p.BluRay.x264.[YTS.AG] indicates that the subtitle is timed for the high-definition BluRay rip released by the group . This documentary, directed by Alex Gibney, covers the Stuxnet virus and the world of state-sponsored cyber warfare.
The "proper piece" for that specific subtitle file is the documentary film . subtitle Zero.Days.2016.720p.BluRay.x264.[YTS.AG]