"BluRay" tag suggests the source was high quality, but the tiny file size negates most Blu-Ray benefits.
Most modern mini-encodes utilize the High-Efficiency Video Coding (HEVC) standard, also known as x265. Compared to the older AVC/x264 codec, HEVC offers up to 50% better data compression at the same level of video quality. It processes information in larger blocks, making it incredibly efficient at compressing backgrounds, skies, and dark scenes—of which there are many in "The 100." Optimized Audio Bitrates The 100 S01E01 BluRay 140Mb Hindi Dual Audio 480p
Release formats like this are optimized for mobile viewing or users with limited storage: BluRay Source "BluRay" tag suggests the source was high quality,