Interesting thread. At my school, we do not have video or audio from lectures posted online. We also do not have access to transcribed lectures. We purchase a syllabus for each class, and that is what we have. That is pretty much all you study by. Most everyone purchases textbooks, but they are rarely (if ever) needed.
Some people here do not go to class, but just about everyone does. We have class starting at 8:00 every day, and it always goes at least until 12:00. We usually have something for a couple of hours after lunch most days as well. That is a lot of time in class, so naturally last semester (my first semester in medical school) I thought that I could perhaps spend my time better. I didn't feel like anatomy helped me by going to class, because everything they said was in the syllabus. However, I ended up sleeping in instead of getting up and studying. More than that, however, I felt really disconnected from the course, as if I were missing something. What if they told us something that we didn't need to worry about? What if they emphasized things more in lecture than in the syllabus? I always wondered about that in the back of my mind.
So this semester, I make myself go to class. No exceptions. Even if the professor sucks and I don't feel like I am getting much, I know that I have to be getting something. Yes, it means that I get home from class at 3:00 and might be tired from having gotten up at 7:00 that morning, but have to push through and study. Yes, it means sacrificing things I could probably have done if I didn't spend all day in class. But I think there is something to be said for peace of mind, and if you are like me, it is worth knowing that you are doing all that you can to obtain the material and make some sense out of it. It is still a learning process for me as I figure out how I study and learn best, but nonetheless I'm making progress. At any rate, be flexible in finding out what works for you, but also be honest with yourself as to what is optimal. If you are in medical school, you are smart enough to get by whether you go to class or not. You have to find what works best for you, and that might not always be the easiest option.