All event video that airs on television is closed captioned. Not all live event streams on cbc.ca/olympics will have captioning. Also, short-format video, such as highlights video, will not have closed captioning. By default, closed captioning is turned off on the Olympics video player.
For a tutorial on how to use the closed caption functions and how to activate the Olympic dual video feature, please see our tutorial here: https://olympics.cbc.ca/news/article/video-player-tutorial.html