The source type, meaning "Web Download." This signifies that the file was losslessly captured directly from a digital streaming service without transcoding the video stream, resulting in quality nearly identical to the original broadcast.
: The audio codec and channel layout. "DD" stands for Dolby Digital (AC-3), and "5.1" denotes six channels of audio (five full-bandwidth channels and one low-frequency effects subwoofer channel) for surround sound. Paheli.2005.Hindi.1080p.NF.WEB-DL.DD 5.1.H.264-...