The metaphor I had in mind was restaurants that make too much food, and (sometimes; some restaurants) they donate it to foodshelves (when appropriate) or sometimes just to some homeless guys who happen to be nearby. The extra food is an externality of their real purpose as a business, which is to take money in exchange for feeding people. They could throw the food away, but instead they're doing something nice with it. Almost nobody would say they should throw the food away because the homeless guys who happen to be the recipients of their largesse are benefiting, while other, further-away homeless guys are not. Such an argument would be idiotic.
In just this way these videos and course materials are an externality of the 'real' business of Berkeley, which is educating the people who are admitted to Berkeley and enrolled in the classes. Berkeley, and others like them, are going above and beyond to be nice to the rest of humanity, to our great collective benefit. This ADA thing is just a kick in the face, and it pisses me off.