Tutorials to repair your keyboard keys

Tutorials in 3D animation to help you fix your keyboard:
-A video to explain how the keyboard keys work.
-A video to show you how to remove a key.
-A video if you need to replace the rubber cup.
-Several videos to repair regular keys size, like the alphabet keys.
-A video for the installation of small keyboard keys.
-A video to install a large key with two hinges and a metal support rod.
-A video for the installation of the space bar of the keyboard with two hinges and two metal rods to maintain.