Well MKBHD is making ~2 million annually on YouTube ads and ads usually represent about 1/3 total profit for people with video sponsors/merch like he does. So he could buy a lamborghini if he wanted. It’s very much a top-heavy field though. Your $ per subscriber increases the more you have. To be relatable few youtubers talk about their finances but a rough estimate is 2-3 dollars per thousand videos (standard) 3-4 dollars per thousand for niche/wholesome content, and usually another ~~~4 dollars per thousand for video sponsors (not available to smaller steamers).
What is often neglected is that the algorithms reward relentless release schedules (ideally 2 videos a week) so it very much is a full time job for the vast majority of them. Since all the money goes to the top most lower tier YouTube people the vast majority are working hard and making effectively 0 dollars (often outsourcing editing and videography).