It is my own, correctly opinion which is sometimes neglected by some educator and viewer that learning and person who learns are two main subjects that cannot be divided and study isolated. So does the speaker's idea thus I partly agree with student cannot be motivated by school and college only because some knowledge we cannot learn from college. Self-study is an important skill for us, but I also regard school and college are significant role in our learning that is equivalent with self-learning.
First, concerning about knowledge we learned, my opinion is primarily from the stand of my philosophy idea that all of our human knowledge can be divided into two parts, one is scientific knowledge and another is social knowledge. The purpose and content of scientific knowledge is to discover the truth of the nature, such us physics and mathematics. And purpose and content of social knowledge is to satisfy human need such as art, and how to live better with others. scientific knowledge can be taught in school because truth cannot be changed easily. However social knowledge cannot or almost cannot be taught in school but mainly through experience. For example, physics and math can be taught in class, and more effective through school because teachers know how students can acquire these mechanical knowledge better. But, when comes to art, especially handcraft work such as how to make chinese and pottery, they cannot be taught in class but by learning from master. So each kind of learning way can cover certain parts of knowledge, they are not exclusive. That is why Self-study and school teaching are equivalently important.
Second, Not all people can acquire knowledge by self-learning. Some people can be better taught and guided then motivated by school. Comparing adult with pupils, adult have their own matured value and they can better decide what to learn and how to or by what kind of method or under whose help they can learn better. However pupils without mature value are not able to control themselves that study in school is a better choice. School provide good resource for learning such as teachers, books, classrooms, and provide opportunities to exchange ideas. More over, school, under the protection of specific laws, can coerce students to learn and generate a atmosphere of competition under which students are willing to learn to defend their self respect. So each kind of learning way have their customer fitting with. Overemphasizing each kind of learning way bay cause absence of method for other parts of people.
Third,  If managed well, these two ways together will promote people' study because the two ways can coexist that undermining each part of them will cause potential hazards to education then students without enough competitiveness will be cultivated due to loss of certain parts of knowledge. So student must have their class to learn scientific knowledge and acquire theoretic supply for work. Also they must have self-study thus to experience what they have learned and explore and pre-learning more knowledge that inverse promote study in school class. And what they cannot learn from class is how to get along with others in social life. In this way, they must try hard themselves and school can help little. The two kinds of learning way are equivalent thus cannot be simply judged for which is better.
It is true that student cannot be motivated alone by school and self-study is crucial in learning. Speaker exaggerated  the role they play and undermine the importance of school education unfairly.They are of equal importance and emphasizing on each part without detachment can cause deformity of education.