The downside of OCW is that, as good as it is, I often find it frustrating because of what's missing from the content for a course. For instance, I don't find ppt slides very useful by themselves, without the additional context that would be provided by the lecturer. If you attended the lecture, the points in the slides could help you remember the details. But if you never heard the details, it's often not clear what…
Aren't a lot of the OCW Lectures available as well? Doesn't that resolve the issue.
It's highly variable. Some classes have full video, which is great. Others, perhaps the majority, have much less material. That's part of why it's frustrating.
You see an interesting course listed. You go to the page for the course. Then you click around and it turns out that there isn't much content posted.