Hi hopefully this is helpful but i also have youtube premium (individual) and for some dumb reason the pricing differs when you subscribe on mobile vs on desktop. i initially subscribed on mobile last year and canceled it bc the price was gonna increase (i think to $18 - $20 USD), and i signed up again on desktop using the same account/email which gave me the $13.99 price ¯_(ツ)_/¯ my billing for next month still says $13.99 so hopefully it stays that way (or lowers lol)