Wgr.1015.720p.yourserie.com.mkv -

MKV files are not always supported by default players like Windows Media Player or QuickTime without extra setup. How to play MKV files - AfterDawn

This filename identifies a digital video file, likely a television episode, and follows a standard naming convention used in online media sharing. File Breakdown wgr.1015.720p.yourserie.com.mkv

: This is likely a "Release Group" tag, identifying the team that encoded and uploaded the file. MKV files are not always supported by default