I support your request to add such display as an option. It is now upto the developer(s) of BS.Player to follow this suggestion or not.
You should be aware, however, that this time-counter will not (
in reality) increase by
1/1000sec at each step! For, the smallest possible significant step will always depend on the actual framerate of the movie. E.g. for a 25fps movie the movie's time counter can only increase by meaningfull steps of (1/25=)
40/1000sec.
(Of course also intermediary step-numbers (resp. time) can/may perhaps be shown but these would be "artificial" and simply correspond to the same framenumber)