Do you have a repair video specific to the Kenmore Elite refrigerator, Model No. 253.44519607 for repairing the evaporator motor? The one you have on your site is for a Whirlpool and installation is different.
To replace the evaporator fan motor you will need to remove the shelving in the freezer compartment. Once removed then you will remove the lower panel in the back of the freezer. With this panel off you will be able to access the fan motor. The fan shroud can come out, just make sure you see how it is in place. You will disconnect the wire harness plug on the fan motor and remove the fan blade. There is a bracket that holds the fan motor in place. You will remove the bracket and the fan motor and install the new fan motor and reassemble.