I don’t have time to watch YouTube videos that exceed 8 minutes in length. But there are plenty of lectures and sermons on YouTube that I’d like to listen to that I don’t need to watch to benefit from. For the last several months I’ve been using listentoyoutube.com to easily convert those YouTube videos to audio files so I can stick them in my personal podcast feed (with the help of Justcast and Huffduffer).
UPDATE: And here’s a site that can do Vimeo. It seems a bit slower on YouTube videos than listentoyoutube.com, but it can do those, too… It also promises a Chrome extension at some point.