This Unity C# script tutorial video teaches how to create a script that resets an object's position after disabling it. The video covers creating a new C# script, adding a public Vector3 variable to store the object's original position, overriding the OnDisable() function to reset the object's position, and demonstrating how to attach the script to an object in Unity. The video also provides tips and tricks for modifying the script and incorporating it into a larger game system. By the end of the tutorial, viewers will have a working understanding of how to create a script that resets an object's position on disable in Unity.