Earlier quoted context omitted.
I don't know if autopilot really "saved the day" there. Maybe for an incompetent driver (which is most, so this is a net positive for safety). But as a human driver, I would have taken human psychology into account and guessed the turning car was going to take advantage of that gap, thus causing me to approach much more cautiously. I don't know how fast that tesla was going, but I don't think I'd be doing more than 5…
There were lots of lights and reflections, and it was night, and the turning car was black. Watching the video the first time, I didn't see the car before it was already in front of the camera. Watching the video second time and knowing what to expect, then I of course see the car in advance.
All those factors indicate the car was going too fast given the conditions -- autopilot or not. It appears that in general, the Tesla AP does not take road and environmental conditions into account (or weigh them heavily at least). In this case, there was no collision in spite of the conditions. But this should have been a giant red flag for Tesla engineers. Unfortunately, the story at hand tells us that they're not doing their job.
> Watching the video the first time, I didn't see the car before it was already in front of the camera.
I didn't either, not at first. But given just the first frame and knowing a collision was about to be avoided, my first reaction was the autopilot was going to prevent a rear-end due to a short stop, or it was going to stop as someone merged in from the right lane.
But you and I are not the driver of this car. The driver should have known the highway was not divided, should have known of the possibility for cross traffic, and he should have adjusted his behavior accordingly. I guarantee you there was also a sign (before the start of the video) indicating there is an opportunity for cross traffic ahead. Given that, those white headlights (they look reddish in the video, but in real life they would be bright white) should caution the driver that a car is probably looking to turn.
The autopilot did not take any of this context into account, and that's exactly why someone is dead today. It's operating with superhuman reaction speed, but with the common sense and wisdom of a 10 year old.