The following is a list of shortcuts available when the video player is in focus or in full screen. 

Note: These shortcuts will only work when the video player is in focus. To move the focus click on the player to pause the video and then use the spacebar button to resume playback.

Action Shortcut
Toggle play/pause the video
k or Spacebar
Go back 5 seconds
Left arrow
Go back 10 seconds
j or Ctrl+Left arrow
Go forward 5 seconds   
Right arrow
Go forward 10 seconds
l or Ctrl+Right Arrow
Skip to a particular section of the video (e.g., 5 goes to the video midpoint)
Numbers 1-9 (not the keypad numbers)
Restart video
0 (not the keypad number)
Go to Full Screen mode f
Exit Full Screen mode   
Escape
Go to beginning of video
Home
Go to end of video
End
Increase volume 5%
Up arrow
Decrease volume 5%
Down arrow        
Increase speed
Shift+> (may not work in all browsers)   
Decrease speed
Shift+< (may not work in all browsers)       
Move forward 1 frame when video is paused . (period)
Move backward 1 frame when video is paused , (comma)