2 examples for mpv

{{ score }} 
  # interactive control 

v                  Toggle subtitle visibility.
J and J            Cycle through the available subtitles.
v                  Toggle subtitle visibility.
j and J            Cycle through the available subtitles.
Alt + and Alt -    Combining Alt with the + or - keys changes video zoom.
Alt+BACKSPACE      Reset the pan/zoom settings.
  Submitted by anonymous user over 6 years ago [permalink]
{{ score }} 
  # Disable on screen controller
mpv --no-osc video.mkv
  Submitted by anonymous user about 10 years ago [permalink]