You can download your video caption files (SRT or VTT files) from any video in your account.
From the Content menu click Videos.
Note: This will reveal your video library. All your uploaded videos are available here.
Hover over the video you want to edit and click Captions.
In the Captions section, click the button for the language and file type that you want. You can choose either an SRT or VTT file for any language.
Note: VTT is the W3C standard for displaying timed text in browsers that support HTML5. Find out if your site supports HTML here.