Most people wouldn’t think of using keyboard shortcuts as they watch videos on YouTube. However, there are actually several really helpful YouTube keyboard shortcuts that everyone should know and use.
First, while watching a video, remember that you can pause it by pressing the Spacebar once. Press the Spacebar again to make the video play.
Second, you can increase or decrease the volume by, respectively, pressing the Up or Down keys.
Third, the Left and Right arrows will let you, respectively, rewind or fast forward through a video.
Lastly, the Home key will take back to the beginning of a video, and the End key will jump you to the end.
One small pointer for making these keyboard shortcuts work – the YouTube video must have the focus, or in other words, be the active object on your screen. You make this happen by clicking once on the window that YouTube appears in.