It says "this video is for entertainment purposes". A badly done electrical job can result in a fire that will kill and damage property.
If you are looking to do the install yourself, it is not sufficient to know only about the Tesla wall connector. The wall connector installation is the easy part.
What you need to know is about circuit breakers, wiring types and sizes, and electrical codes and permits. There is too much to learn for just one job, so you need someone to guide you through the numbers and then obtain permits from your local city so that the work can be inspected (safe).