: Refers to the audio channels. This indicates 5.1 surround sound (5 speakers and 1 subwoofer).
: This means the file was recorded or captured from a streaming service (like Netflix) rather than being decrypted directly from the source (which would be a "WEB-DL").
: Indicates the color depth. 10-bit allows for over a billion colors, which helps prevent "banding" in gradients (like skies or shadows) compared to standard 8-bit video.