HEVC (H.265) — efficient compression, smaller file size than AVC at similar quality

Typically E-AC-3 (Dolby Digital Plus) or AAC from Netflix source; often 5.1 surround

NF WEB-DL (Direct download from Netflix’s streaming servers, high quality)

-CM- (likely a release tag indicating the encoding/packaging group)

MKV (Matroska Video)