: These refer to High Efficiency Video Coding . This modern compression standard allows the file to maintain high visual quality while being significantly smaller than older x264 files.
: Many uploaders use custom 4-letter codes for shows like Jun Kyoju Takatsuki Akira no Suiri or similar lengthy titles. JHMK 720pHEVCUNRATEDS01Completex265ESub.mkv
: Confirms that this single package or folder contains every episode of the first season. : These refer to High Efficiency Video Coding