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

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

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

It would be wrong to film a documentary using a narrative form of shooting it (telling a story).

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