If you are looking to or organize this file for a media library like Plex or Kodi, a cleaner "piece" of text for your file system would be: Deadpool 2 (2018) [1080p BluRay H264 AAC]
: The name of the release group or source that encoded and uploaded the file. .mp4 : The file extension/container format.
For automated management, many users use tools like FileBot to convert these messy release strings into clean, searchable titles.
The filename you provided, Deadpool.2.2018.1080p.BluRay.H264.AAC-RARBG.mp4 , is a standard naming convention used by scene groups and trackers. : The title of the movie. 2018 : The year the film was released.