so the other day I discovered the term MAD along with a few examples of what a MAD is:

A MAD Movie (MADムービー, Maddo Mūbī?) is a Japanese fan-made video, much like an Anime Music Video.

MADs consist of more than just videos. Some MADs consist entirely of audio clips. Some kinds of edited pictures can be considered MADs. MADs do not necessarily even need to be related to anime, though the more popular ones typically are.

MAD is not an acronym for anything, but rather, is thought to be a reference to the name of one of the original MADs.

Here's two examples of MADs: