Porsche 911 3.2 cruising

Drove the road to the intersection where the video starts and turned back,average speed about 80 kmh.Brakes started fading towards the end and the pedal wen´t all the way down after the video ends.Luckily the e-brake worked as supposed,didn´t know about pumping the pressure to the cylinders at the time.3 people on-board and driving mostly on 3rd gear so not too fast,but i also wasn´t familiar with the road.
Location:Southern Finland.