If you want to, you can 'flag' the video in YouTube. You can do so by clicking on 'Flag' on the right underneath the video. Then choose 'Infringes my right', then 'Infringes my copyright'. I don't know how YouTube feels about copyright when it comes to fan videos (since in theory they are always copyright infringement), but it's worth a try.
And I hope that the person who posted the videos will realise what she has done and remove them. It's possible that she just didn't see any harm in it. At least she didn't remove the credits at the end of the videos, but maybe that's just because she didn't know how to.
Oh and by the way, I've also always loved that video.
