From a human factors perspective, our eyes naturally saccade. They do not normally sit still while we observe.
The "trick" only works when we stare and fixate on a single task which is set up in both the spot and basketball scenarios.
That video by Duncan Mackillop is terrific and the first time I have seen the lane weave approach technique recommended.
I have been doing it for many years because I was taught that in order to see something three things are necessary, light, contrast and motion.
The eyes see only what the brain is prepared to accept. We do not "see" what cannot be identified.
Drivers cannot detect, identify, interpret and respond to what is there to be seen if they do not understand what is in front of them.
I do the weave while slowing to a speed from which I can stop within 10 feet or so (about 15 mph) on a level dry paved surface.
Eye contact with the driver is overrated and iffy at best, so I watch the front wheels for rotation and/or turning.
The cage turning in front of me is my largest concern/fear when riding. Likewise fanging while riding on a roadway with intersections, crossroads or driveways is ill advised.