Closed captions as a concept is unique to the States; Europeans refer to them as “subtitles for the hard of hearing” and deliver them as such. There are some technical differences. The practical difference in North America (or Region 1 for all you DVD watchers) is viewers use their TV remote to turn on closed captions and use the remote for their DVD player to switch on subtitles. Most digital TVs make it dead simple to turn on the closed caption decoders. You will need to use the Settings app on your iPhone or iPad to turn on closed captions. Your Android device probably depends on subtitles instead of closed captions, as well.