A documentary which makes fun of someone or of a situation/place could be referred to as a ‘Mockumentary’.

The target audience of the documentary video you watched is probably only animators.

News, talk shows, reality shows and documentaries are similar in that they all involve non-fiction.

A Rockumentary is a form of documentary which tells us more about music or musicians. 

What makes documentaries so appealing is that they often use casual language which most audiences enjoy.