Japan Expo 2010 : The concert Morning Musume. on video
You will find the rest of the article 2 videos “official” concert.
The first is available on the official MySpace of the group and contains the entire medley sung during the second part of the concert.
The second (cut into 3) corresponds to 20 first minutes of concert, such as broadcast on the Japanese video sharing site Nico Nico Douga days ago.