Also note that he installed a "RCBO", whuch stands for "Residual-current circuit breaker with overcurrent protection". It is a breaker that combines the overcur

Also note that he installed a "RCBO", whuch stands for "Residual-current circuit breaker with overcurrent protection". It is a breaker that combines the overcurrent protection with what is called "GFCI" in the US. It offers pretty good protection on the mains side, it is also not that cheap, and a little bit overkill. As you said, the car side is dealt with by the car itself. There are some minor issues (read the YouTube comments, people on YouTube love to comment about safety, justified or not!) but overall quite reasonable from a safety perspective. This is a slow charger and that car is not that different from a regular appliance from the charger point of view.