If you want to go through the content in each module, it takes about 6 hours.
However, when you want to implement the content, that's a harder question to answer. I'll explain.
When I designed MST, I created a step-by-step system that includes practical exercises and worksheets. I give you practical exercises to do. And each lesson builds on the last.
So after watching the videos, you can implement them in very simple and practical ways. Think of the material as a reference you can use over and over again.
I actually recommend you revisit the course every few months as a refresher.