RecTuber 

A YouTuber who primarily makes videos on the video game Rec Room.

"Did you know that person over there is a popular RecTuber?"

RecTuber by DingBoy July 14, 2021

Redtuber 

One who spends so much time browsing redtube videos their cock thanks them for using the tube by cumming excessively.

Randy: I came a quart last!

Bob: How the fuck did you do that?

Randy: I'm a redtuber.

Redtuber by CaptianCuddie69 July 21, 2009

Reactuber 

Someone on Youtube who makes videos related to reactions of other videos, especially music ones.

"I love those reaction videos on Youtube"
"Really? I'm going to start off like a reactuber. You'll love my videos.
"May you make a Lady Gaga's video reaction, please? I love 'er."
"Sure, I'll make it later."

Reactuber by DjB8 January 17, 2019