A compressed archive format. You would need a program like WinRAR or 7-Zip to open it and access the video file inside. If you are looking for information on the movie:
It received generally positive reviews for its humor and faithfulness to Pratchett's unique style. The.Amazing.Maurice.2022.720p.NOW.WEB-DL.rar
Features the voices of Hugh Laurie (Maurice), Emilia Clarke (Malicia), and David Thewlis (Boss Man). A compressed archive format
Stands for "Web Download," meaning the file was sourced directly from a streaming service (like Sky or Hulu) without re-encoding. Emilia Clarke (Malicia)
It follows Maurice, a streetwise cat who leads a band of "educated" (talking) rats and a dim-witted piper to pull off "pied piper" scams in various towns.
Likely the source or the "release group" that ripped the file.