The "story" behind this specific string isn't a narrative tale, but rather a technical milestone in the world of high-end digital archiving and "re-muxing." The string Game.of.Thrones.S04.2160p.BluRay.x265.10bit.SDR refers to a specific, highly optimized version of Game of Thrones Season 4

: x265 (HEVC) with 10-bit color depth. The 10-bit depth is used even in SDR encodes to significantly reduce color banding (false contouring), especially in the show’s many dark and foggy scenes.