Fix player controls Space, Left, Right, Up, Down to behave consistently after page load or clicking individual controls. Not focusing the mute button anymore.
当前为
Youtube player controls will work consistently after page load and after clicking controls:
Click outside movie frame to get standard page controls: Space (page down), Up, Down, Left, Right (scroll)
Fixes the following awkward behaviour of Youtube player controls after clicking them (making the individual control focused):