Closed captions are simply the transcribed text of a video, film, TV show, or a presentation. If you caption your video, you make it accessible to people with hearing problems and non-native speakers. Additionally, closed captions can be used in an environment where you have to be quiet, for example, a hospital, or in a noisy environment, such as a cafe.
If you need to create subtitles for your video, a transcript is the first step. Subtitling videos in various languages can make your content far more popular, as the majority of people on Youtube are non-English speakers. What is more, it can help you as a SEO strategy as your video will be found by people from different countries.