The videos of this online course are all encrypted, so it is too difficult to extract them directly. It should be said that it is almost impossible to download them directly. They can download them easily, and they certainly won't pay for it. But the way is what people think. I really want to record it. I want to record the course with video software first. At this point, there is no sound in the course. You can record the sound with recording software, edit it with goldwave, and combine audio and video with sound and pictures. This is much easier than what you are looking for.