Play the video and select 
in the upper right corner of the screen . Select ‘Subtitle’ and select ‘None’.
If you select the subtitle again from the list, then the subtitle will show up again.
How can I turn-off the subtitle?
Play the video and select in the upper right corner of the screen . Select ‘Subtitle’ and select ‘None’.
If you select the subtitle again from the list, then the subtitle will show up again.