This video explains the vector dot product, and shows how to use it in the Unreal Engine.
It is part of a series on vectors, and their use in the Unreal Engine, designed to help people who have limited knowledge of vectors but want to improve their understanding to better work with them. This one talks about one of the two vector products, the dot product, which is useful in finding the angle between two vectors. It uses a sight cone example. It was created using UE4.26 but the process is the same in earlier versions of the engine.
This video has been made for teaching use at Northumbria University in England, but has been made publicly available. https://www.northumbria.ac.uk/
