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* `TAB`: move forward through each button/element on the player:
* Play/Pause
* Track Scrubber
* Magnify/Minimize Scrubber
* Volume
* Stream Quality
* Create Thumbnail (collection staff only) - removed from media player in 7.7 release
* Add to Playlist (logged-in users only) - removed from media player in 7.7 release
* Fullscreen
* `SHIFT+TAB`: move backward through each button/element on the player.
* `ENTER`: trigger a button/element's behavior. When a media player button/element is selected via tab, spacebar will also trigger the button/element's behavior.
* `SPACEBAR`: any time no text inputs are selected on the page, toggle between Play and Pause.
* `LEFT/RIGHT ARROW`: any time no text inputs are selected on the page, scrub forward or backward through the track timeline.
* `UP/DOWN ARROW`: any time no text inputs are selected on the page, increase or decrease volume.
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