How do I open my keyboard for repair
One of the keys on my keyboard is not working. How do I open the keyboard to repair the broken key?
The video provided above is for a Magic Keyboard, this is a different repair than your wired keyboard.
The type of keyboard that you are describing is the traditional wired Apple Keyboard with Number Pad. To fix a key you don't need to open the back of the keyboard, you can pull the key up from the front to access that specific keys components.
Otherwise, to open the back of the keyboard, you should be able to take a flat head and unsnap the outer edges and tops of the white plate