Second video says the driver "touched the steering wheel once" in 15 minutes of driving. That's a disconnect. So, one disconnect in, what, 10 miles of driving? Waymo reported one disconnect per 1,392 miles to CA DMV last year.
Amusingly, the riders were not allowed to take video.
Actually it's one per 11,017 miles! But be careful quoting the number. It is not all disengagements or all times the autopilot was turned off after being turned on.
It is "deactivation of the autonomous mode when a failure of the autonomous technology is detected or when the safe operation of the vehicle requires that the autonomous vehicle test driver disengage the autonomous mode and take immediate manual control of the vehicle."
These guys also went on the ride-along: https://youtu.be/2BZHXh1nbWc?t=360