Closed captions can be enabled while videos are playing on the PBS app.
While a video is playing, press the pause button on your remote. The video player controls will appear on screen, showing how far you are in the video. On the right side of these controls, there's a closed captioning icon. Using your remote, navigate to this icon and select it.
Select the English option to enable captions.
Use your remote to resume the video and the video should now play with closed captioning.
To disabled closed captioning, follow the same steps above, but select Off instead of English.