A "glitch" in the matrix during the first pass might have caused blockiness in a specific scene, requiring a re-encode of that episode.
Also known as HEVC (High-Efficiency Video Coding). Compared to the older x264 standard, x265 can compress video to much smaller file sizes while maintaining—or even improving—visual quality. arrested development s01s04 1080p x265 10bit patched
For a show with 84+ episodes, storage space becomes an issue. An x264 1080p file might be 1.5GB per episode. An file can bring that down to 400MB–600MB without a perceptible loss in quality. For collectors building a Plex or Jellyfin media server, this efficiency is the holy grail. A "glitch" in the matrix during the first