Adds additional functionality to YouTube videos.
Move the preview image, that pops up when you hover the mouse over the progress bar, with the keyboard.
Left click on the arrow and drag it.
Note: Num Lock probably needs to be enabled.
Alt+Numpad 4: Left
Alt+Numpad 6: Right
Alt+Numpad 5: Left Click
Alt+Numpad 8: Speed Up
Alt+Numpad 2: Speed Down
Alt+Numpad 9: Move More Pixels
Alt+Numpad 3: Move Less Pixels