Captions are written versions of what was spoken in a video. Captions should not be confused with subtitles which are meant to translate what is spoken.
Creating captions also contributes to the searchability of the content, if you search the video portal for a certain caption and the video will be more likely to be found if it contains this caption.
Captions ensure that your videos are accessible and findable for everyone.
The processing time of captions for your video is approximate twice the duration of your video.
An automatically generated caption should always be checked afterward for errors in spelling and punctuation.
Note: This feature is only available for videos that you own.
P.s. If the language of the video you want to provide with captions is not available, you can contact the ISSC.