An entitled amateur with a camera who suddenly has no time or respect for others because they make potentially up to 10,000 usd per video. Usually a means to an end, a youtuber lacks intelligence to contribute anything progressive to society and resorts to unorganized and random videos to game a rigged platform algorithm, all for a reason to signify their existence.
Someone, after taking a bite out of their favorite food, closes their eyes, and makes "mmmm" sounds or starts dancing as they chew.
The friend can then say, you're such a YouTuber.
A miserable prick who doesn't want to find a real career so they sit in front of a computer ranting for hours until they get enough followers they can manipulate into giving money to pay their mortgage
Why try to learn real facts by reading books when you can just watch a dumb youtuber