This video literally shows you otherwise.
Caveat: Autopilot is known to disable itself right before the crash (if it senses it) tho. I doubt this is the case because he would've obviously mentioned.
He did not. Please stop making proclamations on things in which you think but do not know. Mark has also released raw footage to negate this line of attack.
https://www.theverge.com/tesla/631308/mark-rober-tesla-youtu...