You where right oldrebel, i haven't read carefully enough, thanks for the corrections.
If he could open the doors using the emergency blade inside the key, isn't that purely mechanic? So it will trigger the central locking to open all doors and of course the hazard lights will acknowlegde this. If the car could not be opened by pressing the remote fob, usually there is something wrong with the key (battery low or a signal yam in the air).
But what puzzles me more is that in his video there is not reaction on pressing the POWER key. Usually convers shows a "key not detected" message, but here we see nothing. Looks like the key has not effect. So even if we imagine the key programming is lost (which is extremely unlikely) the car would react on pressing the power button.
I never tested what happens when the KVM is off/broke, but as it is part of PATS the car won't start. But this usually shown as a warning in the cluster panel.
Not that only something bad happens to the power knob? yabandabiri have you measured the voltage of the battery? Some modules won't wakeup if that is too low.