If you own a smartphone, combine a talk or interview with a bike ride or jog. If you moderate the pace right, you can still pay attention while improving personal fitness.

Talks are also useful during car/bus rides where if you are a passenger reading can induce motion sickness.

I don't think he normally produces transcripts. If somebody wants to do that, that'd be great.

Varies. Feynman, a transcript is nice but hearing the guy speak is just brilliant. Some videos, ah, quite the opposite. Luke, which is this more like?