To have a fantasy in a Documentary arrangement proposes that you have to welcome the life you have and understand the effect you have on others. You are essential. The fantasy may likewise be an allegory that there is something that you have to "record" or recall."

To have a dream in a documentary format suggests that you need to appreciate the life you have and realize the impact you have on others. You are important. The dream may also be a metaphor that there is something that you need to "document" or remember.