If it is calibrated right you should never need to dip the lights yourself.
There are 3 situations that I have discovered so far when I prefer to dip.
1. Junctions - If a car is stopped at a junction the camera will not see their lights. The system had dipped the middle for the car I was following, but it did not dip the left side. I could see the poor driver sitting in the car fully lit up.
2. Distance - I have been flashed by cars in the far distance. As it says in that video the system probably has a limited range.
3. Sharp bends - on a twisty country road, when I see the bend illuminated by the headlight of another car, I prefer to dip before the bend. The car will only dip when it sees the headlights. It is fast, but the other driver will be looking at my full beam for half a second.
Then there are 3 situations that I'm not sure about.
1. Lorries, vans, 4x4 - if they are over the brow of a hill, the camera cannot see the lights. My lights will almost certainly be blinding the driver.
2. Cars with only 1 light.
3. Motorbikes.