A second semester go-around with this assignment. A little smoother, with some ideas for making it even better next time. Just now I was reviewing earlier posts on this and saw a comment from TeacherLady about using Moodle wikis with groups. I'll ponder that. I do like Moodle wiki groups, at least so far for in-class activities.
At one point I was feeling ready to throw in the towel and go back to the written form of the assignment. But I do like the recordings; I think they bring the content to life.
Speaking of Moodle, I'm using the "feedback" feature to do a quick survey about the assignment with my students.