Extramovies.fit_mrtst15dahe72bresd.mkv -

: Right-click the file and check the "Properties" or use tools like MKVToolNix to see if the actual movie title is embedded in the file's header information.

If the filename doesn't tell you the title, you can use these methods: ExtraMovies.fit_MRTST15DAHE72BRESD.mkv

: Use a universal media player like VLC Media Player . Opening the file and checking the title sequence or the credits is the most direct way to identify it. : Right-click the file and check the "Properties"