On one hand, I can see the popularity of sites like these since they require no additional software beyond a browser. On the other hand, since they have to themselves download the video and then you download it from them, there is quite a lot of bandwidth waste and they're centralised easily targeted single-points-of-failure.<p><i>Cary Sherman, chairman and CEO of the RIAA</i><p>I wonder if people like him live in constant fear of being targeted by pranksters, or worse...