Online classes are way more convenient. If I'm on a real class, my notes will depend on how fast I can write and how slow the teacher speaks. In online classes I don't have to worry about it, thus writing down very complete notes. If there's something I don't understand/recall, I can just pause the video and go read my past notes/google it before proceeding with the lecture.
The only downside is that you can't ask your teachers questions, but I was never one to talk to my teachers anyway. I feel more comfortable asking for help in the online class forums.