uwutuber 

Someone, particularly a youtuber in this case, that puts on a cute persona that is completely different to their persona in reality.

They usually have an anime art style, a "kawaii desu" oc, and they have a small voice when they talk. (Not all uwutubers are like this, this is just an example of a stereotypical uwutuber.)

Comes from the words uwu and youtuber

TL;DR: A youtuber that tries to act cute.

Person: Hey, have you heard of Wolfychu?

Person 2: Isn't that the uwutuber?

uwutuber by whomst'd've'ly'yaint July 20, 2018

Uwutuber 

noun; A Youtuber that is unoriginal/has no actual personality so they put on a cute, shy, "uwu" act to get views.

Youtuber: I like this game.
Uwutuber: T-This game is weally good.

Uwutuber by olive dot com July 21, 2018