Audio tracks are often converted to low-bitrate mono or highly compressed AAC formats to save every possible megabyte. Risks of Highly Compressed Downloads
Compression works by removing "redundant" data. Modern codecs like H.265 (HEVC) and AV1 are excellent at this. However, to hit the sub-100MB target, encoders must: download highly compressed movies under 100mb work
Standard video uses 5-10 Mbps. A 100MB movie runs at roughly 150 Kbps. Encoders strip away "redundant" data—background details your eye might not notice on small screens. Audio tracks are often converted to low-bitrate mono