That file name looks like a specific download for episodes 5 through 7 of the first season of The Sandman . Since it's from a third-party site, here’s a quick guide on what that file actually is and how to handle it: Show/Season: The Sandman Season 1 (S01). Episodes: 5, 6, and 7. Quality: 720p resolution (Standard HD).
The "gold standard." It plays almost anything and handles HEVC perfectly. ep-5-to-7-sandmans01-720p-hevc-hd-desiremovies-ink-1-mkv
HEVC (High Efficiency Video Coding, also known as H.265). This means the file size is smaller but the quality stays high. That file name looks like a specific download
MKV files often use AC3 or DTS audio. If you have no sound, update your player or use VLC. Quality: 720p resolution (Standard HD)
If you expected a video but got a file ending in .exe or .msi , do not open it. That is a program, not a movie.
Files from "desiremovies" or similar sites are often bundled with ads or redirects.