My comment was somewhat tangential to the points made in the video. The video's main thrust was that primary schools seem to be built around the sort of things that girls like to do and are good at doing:
Books read in class are girly books - 'Little Women' etc.
Written stories that are 'confessional' get marked higher than ones with lots of action and violence.
Boys are constantly subject to disapproval for liking the sort of things that boys like.
In American schools, outdoor free time has been reduced and boys need it more than girls to work off energy.
Boys are more generally competitive than girls and removing competitive elements takes away one key incentive for them to do things better.

That sort of thing.