: This is the H.264 compression standard, the industry benchmark for high-quality HD video storage and streaming. YUV444P : This refers to the chroma subsampling method.
The technical specifications you're referring to for 's release of Arslan Senki (The Heroic Legend of Arslan) Episode 25, title: " The Highway of Blood and Sweat ", indicate a high-fidelity encode from the Blu-ray source. Technical Breakdown
(Planar 4:4:4) preserves full color information for every single pixel. This results in sharper edges and more accurate color reproduction, which is particularly noticeable in animation with vibrant lines and high contrast.
Episode 25 serves as the and focuses on the climax of the conflict between Arslan and Silvermask (Hermes).
Most standard videos use , which discards significant color data to save space, as the human eye is less sensitive to color than brightness.
: Indicates the source is a retail Blu-ray disc with a resolution of Plot & Finale Highlights