Ah sorry about that - that's a bug. You should be able to add previous iterations of a course if you select the 'show past courses' checkbox. Will look into this and fix asap - UX for this does need some work too :)
> All exams are proctored using national proctoring standards. We have access to 4,500 physical proctoring facilities and are working with online proctoring institutions.
Does this mean it won't be available outside the US ("national proctoring standards")?
Or does this mean appearing at prometric-style centers for the tests? I for one do not love taking tests in the alien environment of such centers (especially computer-science related tests), from my experience with various certifications.
It's part of a comprehensive course in modern physics, all taught by susskind, and all on that same youtube channel. There's classical mechanics, quantum mechanics, the aforementioned cosmology and more iirc. He's a great teacher, it's amazing that you can just dial up tens of thousands of dollars worth of education like this.