I have always used Safari's awesome activity window to download YouTube videos to my HDD in the past. Until recently when I upgraded to Lion a few days ago, I can no longer do that! I have peruzzed the forums to find out what happened but I can't find a solution! Everything is up to date with the latest software versions of Lion and Safari. I would rather not use a third party to download YouTube videos, especially since activity window is so accessible and simple and not switching applications/opening new tabs for websites. Thanks for looking into it!