title: checking if closed captions are available on youtube video
body: <p>I am currently working on my flutter mobile app that uses youtube video player. The thing is that I want to programmatically check if the video by url has closed captions available. If the video has closed captions/subtitles, I want to know what languages are available.
  Any ideas on how to do this using flutter packages, or which API I should use?</p>