YouTube Keyboard Shortcut Plus by 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.