Rider two clearly locked the front and was down before he got to the first rider. He just needed to swerve right.
Rider one is debatable but it looks like he was on the fronts...so the back was light and flew up on impact. Accelerate...burp it hard just before impact and get the front light so you can go over. Then chop it to get the back light.
They teach that in the BRC with 2x4's.
That said, rider one was pretty fucked, he didnt have much of a chance. But he threw that slim shot away.