Keep in mind that the tutorial has been made three years ago and with high probabilites you will use a different version of Unity. Pay attention to this, even if the differences will be very few. The ...
Unity-animation-basic-Project/ ├── Assets/ │ ├── Animations/ # .anim clips and Blend Tree assets │ │ ├── Idle.anim # Idle animation clip │ │ ├── Walk.anim │ │ ├── Run.anim │ │ └── Jump.anim ...