I don't know about the idea of limiting the video vault to those who either post enough or have can answer TGM questions. I thought the point of the videos were to answer TGM questions.
Totally off-the-cuff question: What's wrong with people "lurking"? One can learn quite a bit from not posting and listening (or reading as the case may be). I find it too bad that those who are either too shy, too inexperienced or too scared of being flamed to post are basically given a synonym for "stalkers"