Kirk Sorensen is an engaging speaker, and he seems to have discovered a sort of video Boswell. See [his blog post](http://energyfromthorium.com/2011/06/04/adventures-with-gordon/). It uses a number of cameras, then editing afterwards to pick between them, or pick from the slides. I'd actually recommend watching the long talk given at protospace. Note that the first four minutes are a highlights package from the rest. I feel that it should be possible to combine this with the hypnotic emphasis you get from seeing the spoken words appearing in text, though that might only work for a carefully scripted talk, which might then, as a result, fail to work as a talk. There are some interesting bits in the talk. Kirk's experience with the weird idea of beaming solar energy from space has perhaps something to say about the way our funding model for Science might sometimes have a negative effect on the quality of the result.