(High Efficiency Video Coding) means the file size is smaller without losing much quality.
Here are a few ways to write a proper title or description for that file, depending on where you plan to use it: (High Efficiency Video Coding) means the file size
"Now available: in high-quality 720p HEVC BluRay with Dual Audio support. Credits to @Rafaj_Moviess for the encode." Quick Tips: (High Efficiency Video Coding) means the file size