The problem with online techtalks

Google has a brilliant selection of their techtalk videos onine. The problem is: What are you going to do with these videos? Are you going to sit at your desk for 45 minutes watching a video? Are you going to watch them at home, in the evening? I could imagine that people that use public transport watch these on their iPod, but they make that difficult as you can not download the video easily. So what am I supposed to do with these videos?