Unity Tutorial: Making AI Enemy that is chasing over player, avoiding obstacles, walls and colliders

I had a tutorial how to make an enemy object that is chasing over a player object in this video:    • How to make "Enemy Chasing Player" in your...   The problem with that enemy is that one is not smart, if there is a wall in front of the enemy and the player behind the wall, the enemy stuck on that wall. So let's work with Unity AI Enemy instead... So in this video we will play around with Unity AI NavMeshAgent and NavMesh Navigation, how to setup the walkable areas and the non walkable areas.