This is a school problem. The school wants to adopt this method. He thinks it is the most convenient way to hand in his homework. It used to be like this. Actually, it's a waste of time. Teachers spend half their class time writing on the blackboard. In fact, I think it is the most time-consuming, but this is the habit of teachers. They just like to write these things for primary school students. Or write these blackboard books for junior high school students. Of course, I think it is a waste of time, because I have time to write this. Why not put PPT out and let everyone know more about other things? That can only show that it is a teacher's habit, especially the older the teacher is, the more he likes to do such things.
So, if you hand in your homework now, it is really the same as before. There is really no way to punch in the video. That's it. Teachers also use this method. It is not that they want to do this, but that the school wants them to do it. This is just a way. In fact, it is essentially to urge students to learn better. I think it's enough for them to finish what they need to learn. As for how students learn, I think students should consider their own problems. Considering his own actual situation, the teacher's homework has been finished. If you don't finish it, the teacher will still be unhappy.