This video helps you to complete the instructions at https://sharpcoderblog.com/blog/unity...
Here's the steps:
Create a new Game Object (GameObject - Create Empty) and name it "FPSPlayer"
Check your FPSPlayer coordinates are (0, 1, 0)
Create new Capsule (GameObject - 3D Object - Capsule) and move it inside "FPSPlayer" Object IN THE HIERARCHY
Change your capsule coordinates to (0,1,0)
Remove Capsule Collider component from Capsule
Move the Main Camera inside the "FPSPlayer" Object IN THE HIERARCHY and change its position to (0, 1.64, 0)
In your Assets folder, make a new C# script called SC_FPSController
Open the C# file and delete all contents
Paste in the code from the webpage (make sure you get all the brackets at the end). Save
Drag the script on to the FPSPlayer in the hierarchy
Drag the camera onto the “Player Camera” box in the Controller