Just more observations: I just watched the last three of @
zeroomega's videos (since another new one popped up on youtube for me today) and on each of them, it really seems like combined gees of 1 in lateral/long on right handers (quadrant 2) is where this occurs:
Each of the significant drops starts around that area on the gee circle. It also occurs in situations where I'd think there has been enough time for oil to return to the pan, such as at 30 seconds in on this video:
It doesn't seem to be braking alone as I don't see it occur under straight line braking, but it does occur at the slightest amount of lateral accel on right handers (again, anything in quadrant 2) that exceeds 1g combined...