&gt; <i>This would be one way to ensure most videos are high quality.</i><p>I&#x27;m not so sure of that - Amazon can&#x27;t possibly police every single video to ensure correct closed-captioning.  There are likely tools that can take a video, rip the audio stream and machine generate a subtitle file for you.  If you have a person uploading a family video this will pass the &quot;good enough&quot; bar for you.  You&#x27;d get something close to Youtube&#x27;s automatic closed-captions.