"Do you like this music?"
"No. It's crap, and I'm a pianist so I think I should know."
Sounds like an arrogant prick.
Ha. Pretty good. I might have to steal that one, if I can remember it at an appropriate time.
Yeah, I think I agree with several people (I don't differentiate "piano player," "piano picker," or "pianist," as concepts, just synonyms in slightly different registers): if you have a book of repertoire, meaning you can pick and choose from your repertoire to play for a certain non-trivial amount of time something most people would recognize as music, sounds like a pianist to me.
Also, even though many advanced musicians still work with teacher/coaches, if you don't rely on anyone's advice, ultimately, but your own to choose repertoire or to identify technical problems to correct, sounds like a pianist.
If someone asks you impromptu at some occasion to entertain the crowd for a while on piano, and you can play appropriate music by sizing up the audience, that sounds like a pianist.
However, the obsession some imho intellectually-disabled people have with the corporate, tax-structures of "professional," "semi-professional," "amateur," or whatever are for retards.
If you get paid to play, you're a professional. If you don't get paid very much, then you're not a very good professional. If you make videos and monetize them, you're an entrepreneur who's selling some stuff you made in your basement. Power to you.
If you play jobs for "the experience" (i.e., without any compensation whatsoever) IMHO, you're lower than an amateur, you're a chump, or maybe 15 years old and don't know any better. Some exceptions can be made for volunteering for the cancer ward or for AIDS babies, or at the old folks home. I personally think people who put all kinds of videos for free on YouTube are losers, but at least they're developing a portfolio. I'd never do it without money in the hand, but I'm lazy and dislike "helping" people without a good reason that benefits me directly.