[x] Make all UI components navigable using a TV remote when running on a TV device. (The buttons on these remotes usually map to regular keyboard buttons, like the Enter key and the arrow keys.)
[x] Extend the default UI to use an optimized layout on TV devices.
Some ideas:
Instead of showing a play/pause button, make pressing the OK button (Enter key) on the seekbar toggle play/pause (like the YouTube app).
In the default UI, move all of the controls to the bottom.
Some ideas: