Youtube Shortcut Keys

Some useful short cut keys for youtube:

K – Play/Pause (spacebar also)
J – Go back 3 seconds when in play / go back one frame when paused (Left Arrow also)
L – Go forward 3 seconds when in play / go forward one frame when paused (right arrow also)
0 – Go to start of video
F – Fullscreen (ESC to exit fullscreen)

1-9 – The number keys can be used to jump to a point on the timeline.
5 jumps to 50% or half way through the video.
1 jumps to the 10% mark and 9 jumps to the 90% mark.

Volume Controls:
M – Mute
Up Arrow – Increase Volume 5%
Down Arrow – Decrease Volume 5%