With the advancement of technology, classic school becomes more and more obsolete. When you teach to dozens or maybe hundreds of students at a time is inefficient. Only a few of them will be able to follow you and understand. If they get stuck or they get bored of what you are saying then you will be lost. On the other hand, when watching a video course, the student can pause to get some time to think about it, or to get back to something he is not so sure about that you previously said or that he should have known so far. Instead of teaching the same course 5 times a week, the professor can use this time to improve the video course and to work alone with every student to help him to get over hops.
Another big advantage of video courses is that you can show something practically without really being in a workshop while you are teaching it. More, the student can watch your video course while he is in a workshop where he can practically understand what you are saying.
If a professor can teach thousand of students this time, he can do a better job while the education costs will remain at very low costs. Our platform, VideoCollege.org is free to use and features many video courses from hundreds of teachers, covering 43 skillsets.