This specific release format is designed for modern home theater setups that support playback.
However, this appears to reference a of the movie Annabelle (2014) — likely a 4K WebRip encoded in HEVC with HDR10+ or Dolby Vision (“cm” might refer to color metadata, “top” possibly a release group tag).
: Could imply that this is a "top" version of the video in terms of quality, perhaps suggesting it has been particularly well-transferred or mastered.
This file name follows the standard naming convention used in the Warez and P2P (Peer-to-Peer) release scenes. It contains specific technical tags that describe the quality, source, and encoding of the movie file.