My friend wrote this sentence about these videos:
"これは日本の替え歌王だよ。"
http://www.youtube.com/watch?v=Mtjxrf2Vg7g&feature=player_embedded
http://www.youtube.com/watch?v=aEeELyiLDKg
I'm not grasping the subtleties of this expression, so I'm wondering what the exact meaning is and what would be a good translation into english.