Here's the 35 second clip:
Thanks for posting a link to this video. It's a great reminder that Autopilot is currently only as good as the lane markings (and sometimes the vehicles being followed), so if lane markings are missing or irregular, it's more likely that Autopilot might do something that you don't expect it to do while driving.
My experience (owning one of each Model X) has been that
AP2 tends to be left-biased (or "left-handed", if you will) in the same location that AP1 tends to be right-biased (or "right-handed") when a single lane opens up into two lanes.
What do I mean by this? Let's
look at Exit 23 off US-17 North in Campbell, California. If you engage Autopilot on the exit lane (before reaching the exit sign shown in Google Street View), then use the stalk to reduce maximum speed to 45 MPH (before the exit sign) and finally let Autopilot pick a lane when one lane opens up into two lanes, you'll find that AP2 picks the left-hand lane while AP1 picks the right-hand lane. (I don't recommend trying this, but if you do, disengage Autopilot well before the right-hand turn.)
Why does AP2 behave differently than AP1 here? I don't know, but I think it is interesting in light of the accident that started this thread, and the video from Chicago above per an article in Electrek today:
Tesla owner almost crashes on video trying to recreate fatal Autopilot accident.
Note that there are
many differences to this road from both the interchange in Mountain View, California and the interchange in Chicago, the least of which is that it's not an interchange, there is no gore area involved (just one lane widening into two lanes), there is yellow paint on the left lane marker, there are no adjacent lanes connected by a paved surface, and I'm reducing speed manually as it drives (so as not to go unusually slow in the exit lane).
Also, I'm certain you can find locations where AP2 is right-biased, so it's
not always left-biased. In fact, if you take
Exit 10 off I-280 North in Cupertino, California onto Wolfe Road with Autopilot engaged (again, reducing maximum speed using the stalk to around 45 MPH once on the exit ramp), AP2 will prefer the right lane instead of the left lane when the right-hand lane opens up into two lanes. (Here again, the road geometry is different with a dashed line on the left lane marker, a solid line on the right lane marker, and additional lanes to the left but not the right.)
Anyway, I find it useful to know that this behavior difference exists since I drive vehicles with both AP1 and AP2 frequently, so I really can't assume which lane Autopilot will take in these situations. (And this behavior could change in the future with a software update anyway.)
EDIT: following -> followed typo