YouTube Keyboard Shortcut Plus от Exis

This extension will enable keyboard shortcuts on YouTube.

<All the shortcut keys this extension will enable:>

A: 3 secs backward
S: pause/play
D: 3 secs forward

C: Toggle CC(subs) visibility
\: Copy the CC text
[: decrease Playback Rate
]: increase Playback Rate (by 0.1 up to 2.5x)
P: Toggle Playback Rate (1.0x and Customized Speed)


(You can also change these shortcuts very easily!)

All you need to do from now on is just install it and click the icon! (^o^)
This extension is extremely useful especially for language learners.