What I got from the video was, aslong as your bad habbits, youve picked up over the years dont affect your control and safety of the vehicle, you will be fine mate.
For example, you could show you are in control of the vehicle by switching on auto hold, therefore at a junction the car is safely under control or use the handbrake and put the car into neutral aswell.
Park mode, locks the transmission with a metal pin and is used when the vehicle is parked up after use imo.
Drive how you would normally, there is less chance of you complicating matters. They are looing at control, awareness not a prim and proper driving test!
Above all don’t worry 🙂