Likely the name or handle of the person/group who encoded or uploaded the file.
The original string Entr3V1d4Mu3rteHDR.yamil.part2.rar contains several pieces of technical metadata: Entr3V1d4Mu3rteHDR.yamil.part2.rar
A "proper text" for that file name typically means removing the technical suffixes and formatting it into a standard title. Likely the name or handle of the person/group
Based on the naming convention, the actual title of the content is likely (Spanish for "Between Life and Death"). Recommended Title Formatting Standard Title: Entre la Vida y la Muerte Entr3V1d4Mu3rteHDR.yamil.part2.rar
This indicates it is the second part of a multi-part compressed archive. How to Use This File