Question: how to add subtitles to a video on windows media player?
Answer: Selecting "Tools" from the menu bar (keyboard equivalent: Alt+T),
Select "Options"
Select the "Security" tab.
Check the box "Show local captions when present"
Select the "OK" button.
Turn captions on by selecting "Play" then option "Captions and Subtitles" then sub option "On if Available".