The video codec used (AVC), which is standard for most devices. DD2.0: The audio format is Dolby Digital 2.0 (stereo).
The file was losslessly downloaded directly from a streaming service (rather than being recorded/encoded from a stream). Feathers.2021.PL.HMAX.WEB-DL.H264.DD2.0-K83.mkv
The "tag" or name of the release group that prepared the file. The video codec used (AVC), which is standard