I was actually wondering about the AI class... it's not listed on the Open Classroom site. It's really weird that they are not under the same umbrella but I guess the AI class is managed by that start up or something? Thanks anyway.
From AI class FAQ;
Will the videos be available without enrolling? Yes, however you will not have access to any other features of the course including homeworks, exams, discussion groups, and posts from the professors.
So I guess you're out of luck as far as the web app, quizzez etc. All the videos are on Youtube so they will be available after the class has finished