Well he may not be playing every other month at the Dog & Duck like some of us, but there is serious money to be made with a successful YouTube channel. Would you rather be playing some pub occasionally or be wealthy through music?
Case in point - Steve Terraberry. If you don't know him, don't look him up, you won't like him at all! However, he is a home guitarist who does mad guitar related videos and now has 3.5 million subscribers. He bought this house:
He bought a McLaren 720s
OK, so lets go back to the question "what is his musical career ..."