Deciphering a file name like shutterisland20101080pblurayx264yifymp4 can feel like cracking a secret code. If you’ve encountered this specific string, it isn't just a random jumble of letters; it’s a detailed technical ID for a specific version of Martin Scorsese’s 2010 psychological thriller, Shutter Island. 

Shadow Detail: In a film about secrets, seeing what is lurking in the dark corners of Ward C is essential for the viewer's immersion. The "YIFY" Phenomenon

Conclusion

YIFY: The name of a popular, though controversial, movie release group known for providing small file sizes for HD movies.