This is a video I found on YouTube, It is of a man who makes a custom shower base (The part of the shower where you stand and the drain is). He goes about showing you of what kind of concrete (Mud) to get , how to mix (consistency of the material).Then he shows you how to pour the mud and set the pitch from the base to the drain. And Much more. This is great information for a home improvement bathroom remodel.
This video is for references and was not made by Handyman Problem Fixer.