The video is an introduction to materials and shaders in UE4/UE5 aimed mostly at people who are new to the engine.
Check out this tutorial on how to create a Master Material from scratch made by 3D Game Artist Braytonks3D. In the video, the artist shows the typical parameters of a Master Material, covers Texture Sample parameters, UV scaling, Base Color tinting, and parameter organization.
Braytonks explains how to control Normal Intensity and adjust Roughness, Metalness, and Ambient Occlusion. He also talks about emissives and shows some Material Instance examples.
You can find other useful tutorials on Unreal Engine, Substance 3D Designer, Maya, and other software on the artist's YouTube channel.