For those who are just beginning their study of Greek and especially those using David Black's primer, there is a web site that you might find useful. The link is http://thebible.net/video/greek/. It consists of 35 prerecorded lectures on NT Greek and appears to walk through Black's text. I don't know the gentleman conducting the training, but his name is John Moore. The first video states that the material is freely available for non-commercial use.
I watched a couple minutes for a few lectures and found them to be sound. That's not an endorsement of the entire series, but from what I saw, I think it could be helpful for a self-learner.
