You must have amazing eye sight as I couldn't tell from the video posted that he/she did all that.
I'm not saying the bike rider is blame free - it was a stupid overtake by him too, but the car shouldn't have overtaken. Although those road markings say do not cross unless necessary - that means that if there is an obstruction or a slow convoy or an EXCEPTIONAL circumstance you can cross that line, but on such a road, doing that overtake (by the car) is foolish. The car doesn't have the power to perform a safe overtake in such a situation, not with the oncoming traffic bearing down on him.
IMO it's 50/50 - but let's face it the biker died, so he doesn't really "win" out of this does he.
Bikes are SO SO quick, loud and very easy to see, but they do creep up on you if you're not observant - that's one thing 9/10 car drivers are not.