(more info)

The additional information that's beside Youtube videos to give more information pertaining to the video your watching.

Many people put songs in their videos and put the names of the songs in the more info. The video owners do that so people can find out what the name of the song(s) playing. But there has to be some stupid idiot who never reads the more info on videos and posts a comment "whats the name of the song? or something along those lines".