: Most likely a "tag" for the uploader or encoder who prepared the file.
: Specifies that this is the third volume of a multi-part compressed RAR archive . Why it is not an "Essay" Mu3r3H4rtHD1080p.yamil.part3.rar
: Likely a stylized title of a specific film or series (possibly "Muer3 Hart," which translates from Spanish as "Dies Hard," or a similar title). : Most likely a "tag" for the uploader
: Indicates the video resolution is High Definition (1920x1080 pixels). Mu3r3H4rtHD1080p.yamil.part3.rar