There’s another video where people are passing basketballs, and a ‘gorilla’ walks among them.
In the beginning, the conductors of the experiment give you instructions as to ‘what to look for’.Apparently lots of people are intent on the instructions, and don’t see the gorilla (I suspect that serious b-ball players wouldn’t see the gorilla, either :-):
https://www.youtube.com/watch?v=vJG698U2Mvo
https://www.youtube.com/watch?v=qCDc4mmPAaI
That’s wacist