https://v4-15-12-dot-shaka-player-demo.appspot.com/docs/api/shaka.ui.CastButton.html
JSDoc: Class: shaka.ui.CastButton
jsdocclassshakauicastbutton
https://nightly-dot-shaka-player-demo.appspot.com/docs/api/shaka.ui.CastButton.Factory.html
JSDoc: Class: shaka.ui.CastButton.Factory
jsdocclassshakauicastbutton