Actually, I was doing some updated courses a while ago, which I started a few years back and wanted to finish. I could follow the videos and reading material, but I could not do the end—of-week quizzes without paying. This really put me off.

It’s vastly different for many courses. The exercises are often paywalled, which means you can’t put your skills to the test.

And at that point, you're just watching videos and, while people learn in different ways, you may be just as well or better off picking up a book and taking advantage of resources like MIT OCW.

Entitled much?