Noufal Ibrahim has part 2 of his series on Gnus up. The screencast is about 30 minutes so he broke it into two videos. As with part 1, the screen is too small to be read comfortably, even on my 27-inch iMac, so I used one of the alternative files from his Archive Page instead. The h.264 worked well for me; it streamed as normal and I could blow it up to full screen so that I could see Ibrahim's Emacs screen easily.
Gnus is just too large and complicated to try to learn from a video so I approached the screencast as an exposition of the things that Gnus can do and why you might want to invest time in learning it. If you're still using Net News and are looking for a single system that can read it, your email, RSS feeds, and probably anything similar with a consistent interface, Gnus is worth looking at.
That—to me—is the value of Ibrahim's series on Gnus: you get a feeling for what it can do and what the work flow looks like. I'm looking forward to the rest of the series. I'm not sure I'll become a Gnus user but at least my decision will be an informed one.