This is the most important qualifier. "BluRay" means the file was ripped directly from a Blu-ray disc (typically the 2009 or 2012 re-release). BluRay sources are lossless. They contain DTS-HD Master Audio (usually) and a very high bitrate video stream. Compared to a DVD Rip or a Web-DL (downloaded from a streaming service), a BluRay rip has superior grain structure and color depth. For a film as visually rich as WALL-E, a BluRay source is non-negotiable.
Animation compresses differently than live action. Solid colors and flat surfaces (like WALL·E’s yellow chassis) can be compressed heavily. However, the dusty, volumetric lighting of Earth requires care. A good x264 encode from a BluRay source (like the one KatmovieHD indexes) preserves the film grain and lighting gradients better than a standard WEB-DL from Netflix or Prime. KatmovieHD-Wall-E -2008- BluRay 720p X264 -Dual Audio
The search term “KatmovieHD-Wall-E -2008- BluRay 720p X264 -Dual Audio” is not random. It is a specification code used by release groups to inform downloaders exactly what they are getting. Let’s decode it: This is the most important qualifier