Title says it all. Hit "?" to bring up the help page for commands (it's hard to memorise the shortcuts). Also I suggest you change the shortcut to the following, since they are shortcuts for YouTube and pretty much the standard across all websites:
J or ← - skip back 5 seconds K or Space - pause video L or → - skip forward 5 seconds Home - Jump to the beginning of the video End - Jump to the end of the video Shift+N - Jump to previous video Shift+P - Jump to next video
"?" for help page and shortcut changes
Title says it all. Hit "?" to bring up the help page for commands (it's hard to memorise the shortcuts). Also I suggest you change the shortcut to the following, since they are shortcuts for YouTube and pretty much the standard across all websites:
J or ← - skip back 5 seconds
K or Space - pause video
L or → - skip forward 5 seconds
Home - Jump to the beginning of the video
End - Jump to the end of the video
Shift+N - Jump to previous video
Shift+P - Jump to next video