This fixes a quite severe user experience issue where pressing the
'alt', 'meta' and/or 'ctrl' key along with one of the supported keys
(e.g. 'f' to enter video fullscreen mode) would overwrite the default
browser behavior. In the case of 'f+meta' we would enter fullscreen
mode, and not open the browser search panel as one might expect.
This change is required to stay consistent with the way YouTube
handles keydown events.
* js: add support for keydown events
This will modify the player behavior even if the player element is unfocused.
Based on the YouTube key bindings, allow to
- toggle playback with space and 'k' key
- increase and decrease player volume with up / down arrow key
- mute and unmute player with 'm' key
- jump forwards and backwards by 5 seconds with right / left arrow key
- jump forwards and backwards by 10 seconds with 'l' / 'j' key
- set video progress with number keys 0–9
- toggle captions with 'c' key
- toggle fullscreen mode with 'f' key
- play next video with 'N' key
- increase and decrease playback speed with '>' / '<' key
* js: remove unused dependency 'videojs.hotkeys.min.js'
Support for controlling the player volume by scrolling over it is
still retained by copying over the relevant code part from the
aforementioned library.
