What is close caption and how to create subtitles/cc on YouTube video

Hi Guys Welcome today i will show you what is close caption and subtitles and how to use subtitles and close caption in your YouTube videos.
Closed captioning (CC) and subtitling are Displaying Text on a television, Video screen, Or other visual display To provide additional or interpretive information. 
 HTML5 defines subtitles as a "transcription or translation of the dialogue ... when sound is available but not understood" by the viewer (for example, dialogue in a foreign language) and captions as a "transcription or translation of the dialogue, sound effects, relevant musical cues, and other relevant audio information.
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