-ds--21 -q.desire.2011.1080p.bluray.x264-pfa.mp4 (2027)

-DS--21 -Q.Desire.2011.1080p.BluRay.x264-PFa.mp4

Could you clarify what specific feature caught your attention? For example: naming convention, encoding metadata, or something else in the file structure? -DS--21 -Q.Desire.2011.1080p.BluRay.x264-PFa.mp4

It sounds like you're pointing out an interesting feature in the filename: -DS--21 -Q