PSA is well-regarded for finding the "sweet spot" between file size and quality. For a movie like Toy Story , which has relatively clean digital lines, the x265 codec performs exceptionally well. You will likely see sharp textures on Woody’s fabric and Buzz’s plastic without the "blocky" artifacts found in older x264 rips.
: The video compression standard used. HEVC (High Efficiency Video Coding), also known as H.265, is the successor to the older H.264 standard. The "x265" suffix indicates the open-source encoder program used to write the file. toystory1995720p10bitbluray6chx265hevcpsa link
This is the "encoder" or release group. PSA is well-known in file-sharing circles for creating very small file sizes with surprisingly high visual quality. PSA is well-regarded for finding the "sweet spot"