The figure drawing lessons haven't been present on the website for a few years now, the intro videos in general are quite a bit older than some of the other content on the website. Basically, Uncomfortable wasn't happy with the level of polish on the figure drawing lessons and took them down. This was for a couple of reasons:

  1. Because it's such a popular subject, it would tend to be the thing that people would jump to first and the quality of the content reflected worse upon the rest of the lessons.

  2. Uncomfortable himself didn't feel particularly equipped to teach the subject and there are a lot of better resources out there for that kind of thing - e.g. Proko, Hampton, Loomis, etc.

There's unfortunately no intention to bring them back - the next lessons that Uncomfortable is looking to add to the curriculum are design/illustration ones, though they're a ways off as well. You can check out the other resources I mentioned above if you'd like to learn figure drawing from a more constructional perspective.