In an example of the Effect of YouTube Trevor Moran rose to notoriety mostly for his Apple Store dances at first. Then a few years later his brief run on X Factor (USA) broadened his audience. Since then he’s been releasing music in a most 21st Century way (mainly singles).
I don’t know if it’s ever been logged but Moran is now likely the first singer to come out of the closet via a music video. You can see it here:
And if that was too subtle, or if you still had questions, he addresses it humorously and honestly here: