DanOlson

What is the status of this? Are captions supported now? I see the [accessibility statement](https://github.com/UniversalViewer/universalviewer/wiki/Accessibility-Statement-for-the-Universal-Viewer#issues-with-content) says they are not, but the merged commit 5436bcdd is newer and seems to add...

@demiankatz yes, here's one for an audio media item: https://gist.githubusercontent.com/DanOlson/945c901a49ade5524bd1fb7fa920ceef/raw/e770069a5a77db5b20b0e7cc3326b1722e3b6f1f/interview-with-h-wyman-malmsten.json and here's one for a video media item, for regression testing https://gist.githubusercontent.com/DanOlson/e22318c3e6ea843784d5bc23d2f9b1ae/raw/c27df9dc0839ce0b071f80715928e1ed19da9064/assignment-for-tomorrow.json The changes here assume the same structure for...