i think these videos are targeted mainly towards a much less technically-savvy audience than the folks here on HN.<p><i>I watched some of these lectures - they're excellent, but a bit too hand-wavy.</i><p>sure, but what more can you expect from 10 minutes?  i don't care how great a 10-minute youtube video is, it can never provide the depth that sophisticated primary sources can.  but then again, we shouldn't expect it to go nearly that deep :)