The video is coming from the family, attempting to soil the jury pool for their upcoming civil trial in tampa where they're going to sue Hulk for his entire estate.
There is a big media battle going on up here. During the criminal trial, the family and its attorney interjected a lot of unnecesary things to make them admissible for the civil trial, etc. They were playing this for $ all along.
Very tragic what happened to their kid, and yes, they did know that Nick was a racing a-hole. But the family is now making this a money game.