Copyright Assignment

This video is pretty legitimate; in fact, it has its own copyright and was posted by the owners of that copyright. Nevertheless, there seem to be a few citations missing. One of the songs, Tomoyasu Hotei's "Battle Without Honor or Humanity," is cited and available for download, but two or three others are used that are not cited. That is really the only problem I can find because Jane Austen's works are public domain, plus this falls under the category of parody. Assuming that not citing these songs is, in fact, infringement (though they don't use the songs for a significant duration of time, so I'm not completely sure that they're doing anything wrong), they could simply add the song's information to the credits already attached to the video. No matter what, it would be a good idea to do that just so anyone who wants access to the songs can find them.