It's okay. The lecture progresses quickly, so I have to stop in the middle, write the source code, and then go back to listen to the explanation. Above all, there weren't many OPEN CV lectures, but I think it was very helpful. It's not a disadvantage of the lecture, but if I have to say, it seems to be only possible in WinForm. I checked if it can be used in WPF, but the controller isn't loaded.... Anyway, it seems to be a good lecture.