Add hotkey support

[qcts33]

It would be nice to have some hotkey support. Such as space for toggle pause/play and right/left arrow for forward/back.
This seem to be a drop-in solution: https://github.com/ctd1500/videojs-hotkeys

[WhiteBlue]

Thanks, It's useful. Will add it in next update.

[qiansen1386]

F: fullscreen
<: 减速
>: 加速
空格: 暂停

熟悉吗？F 按键绝逼超好用。