Nintendo is abusing youtube's Content ID system to get free money from people who play their games and stream them on youtube by forcing advertising revenue to go to them rather than the person that made the video. Expect to see a fall in nintendo LP's as they are no longer profitable for people making them. NintendoCapriSun will probably stop doing videos altogether unless this situation is reversed fast
http://www.reddit.com/r/Games/comments/1een9t/nintendo_is_mass_claiming_gameplay_videos_on/
UPDATE: It appears as though not just LP's are being targeted. I saw a Nintendo ad on "13 Ways to Die - The Legend of Zelda" ( http://www.youtube.com/watch?v=9Yv2kURpR9E ) and reports indicate that reviews are also being targeted