I'm not so certain the Lambo was speeding. Speed is notoriously difficult to judge by onlookers and estimates of speed can be affected by a lot of things, including our expectations. Oh, look it's a Lambo, it's fast, people drive them fast, so it must have been going fast. I'm not saying that I'm sure he wasn't speeding, I'm just saying that I don't think we can be certain he was, at least not by what I've seen in the video.
How exactly can you just the speed of a car based on it's sound? Kind of a serious question.
Again, I don't think it's clear that he's speeding. Also, maybe he didn't hit his brakes because he didn't have time or maybe he didn't see the other car. I don't mean to sound like the Lambo driver's apologist, but you're kind of coming across as a hater without just cause.
The Lambo driver doesn't pick up a piece of his car, the good Samaritan in the red sweatshirt did.