Ever wonder how many YouTube videos vanish from alleged copyright violations? A Massachusetts Institute of Technology research project called YouTomb can show you some.
The site, an effort by the MIT Free Culture group, scans the most popular YouTube videos for the metadata Google inserts after a video has been taken down. YouTomb shows a list of recently removed videos (which you can't actually view), who requested their removal, when they were taken down, and how long they were up beforehand.