What is the difference between a vlog and a documentary?

[Anonymous]

[CluelessJ]

A documentary is usually about someone or something that has been researched or is being researched and its report on the subject, put into a video as a way to let others learn from it
A vlog is when someone records their life, the same way they would write about in a blog, but in video form

[scragbas]

a documentary is a factual video report on a subject. a vlog is an idiot with a camera recording himself saying and doing stupid things.

[yilanjor]

vlog sucks