Sitting on the fence and keeping a balanced view, one would be looking at the evidence on the clip ;-)
The Mazda is just edging out and no more, he is literally inching out of the side road. Seems he may have just mistimed the speed of the Lambo (doest necessarily mean it is speeding), or just he didn't see it, perhaps due to it's matt black paint. Therefore Mazda holds some responsibility.
How fast would the Lambo have to be going to be lifted up the way it did? I'm not a crash investigator expert, but I would have thought if he is travelling at a low speed he would just plough into the Mazda, rather than go semi-airborne. Plus the Lambo continued for a good few metres before stopping.
Perhaps it will end up being a knock-for-knock verdict. Probably we will never know....