I was looking for a video on youtube that explain what I mean and while this isn't the perfect explanation I think it's ok. 19:30.
Even tho Ferrari guy did not do any deffensive move, he would have gotten away anyway, if he just mind his own business and went outside. OP would need to slow down and would not have enough speed to finish the overtake. No harm.
Instead, Ferrari guy hit OP with rear of his car, resulting in contact. I think this exact scenario that happened in OP's video is kind of hard to judge because tho OP was behind the Ferrari guy, BUT there was not speed match between those cars.