I think this happens in other modes too, including auto regen mode - but honestly, these people who rely purely on brake lights to know to slow down are a liability imo, personally I've sat behind Tesla's and other EVs that are clearly slowing down and no brake lights and it's never caused me an issue or any annoyance. I wonder if these accidents are also in part due to people driving too close behind another car that happens to be slowing down.This can be both dangerous and as he mentions a little into the video, a reason both for fault in accidents and fines from the Police.
EDIT: For those who don't want to see, the quick breakdown. In i-Pedal the break lights don't come on before letting go of the accelerator pedal fully, or the care is at a full stop. With the different regen modes, it also have to fully let go of the accelerator pedal.
The cars behind will not see you breaking much of the time, if you don't use the breakpedal.
Yes, maybe the algorithm needs to be tweaked (I believe the deceleration if hits a certain gforce will trigger the lights) but also people need to pay attention to cars in front of them and not rely on brake lights so much.
With my previous ICE cars I often used engine braking to slow down and brake lights wouldn't have shown (sometimes with significant deceleration) and I never had any issues.