Whoopi Goldberg explaining about some elements (particularly Mammy Two-Shoes) being unacceptable in todays world.
She did the same for a set of Looney Tunes cartoons: https://en.wikipedia.org/wiki/Looney_Tunes_Golden_Collection:_Volume_3
Volume 3 is the first in the series to have a disclaimer on the box art stating that the set "is intended for the adult collector" and may not be suitable for younger audiences. It is also the first to feature a warning, given by Whoopi Goldberg, a fan of the Warner Bros. cartoon characters, who tells the viewers that some of the cartoons on the set contain content that is politically incorrect by today's standards, but will be shown uncut for historical reasons, because "removing these inexcusable images and jokes from this collection would be the same as saying [these prejudices] never existed". Future volumes also contain this warning, which is presented instead as a title card before the main menu.