The video does not show any auto-driving. It seems like they were trying to demonstrate an auto-brake accident avoidance feature.
Basically, the driver (appearing to be fully in control the whole time) reversed the car and then gunned it, aiming at the pedestrians. I'm guessing the expectation was that auto-brake would kick in before ploughing into the bystanders.
This was a boneheaded move on part of the driver and the idiots who agreed to basically be crash test dummies. Fifth Gear tested auto-braking with a sophisticated dummy car, and it didn't always work reliably (see https://www.youtube.com/watch?...).
Just to reiterate, this was not any kind of auto-driving failure.