Some interesting views. Just my response as all I done was posted the video and not much else, so no background.
Before slowing I had cruise control set to 50-55mph (60 limit). I saw the ambulance as it came around the bend ahead (as Andy has said the only one in the 8-9mile stretch) and was looking carefully at what the cars on the other side of the road coming towards me were doing.
The some of the vehicles in front of the ambulance were slowing, and there was a good clear space in front of me for the ambulance to use to overtake, so I checked my mirror, smart was a safe distance away, I indicated left and pulled over and slowed at what I'd consider a reasonable rate of deceleration.
Ambulance could then see I'd pulled over and stopped and that it was safe to over take the cars in front of me. This is the mothod I usually use along this stretch of road where this incident occurs normally weekly (I use the road twice a day).
Lots of what if's, yes I could have crawled along, I could have ignored the fact an ambulance was coming and continued as normal, but I know that for that situation what I done was best.
The road has a fatality almost on a monthly basis and even the best of drivers cannot easily judge distances on it normally due to the lack of road furniture etc, so what I done I feel made the ambulance drivers job easier. I'm fully away of how stopping can sometimes hinder ambulances which is why I've at times accelerated out of their way (another vid of that on my channel somewhere).
Ultimately the girl in the Smart was at fault, I've no hard feelings against her, we all make mistakes, and I know how easy it is to 'switch off' on this particular road. I'm just glad in the whole scheme of things that it was a minor accident - even though it's annoyed and will no doubt inconvenience me. Her insurance co have already admitted liability btw.