Nor does he have millions of subscribers. His YT page shows 109,000. As the screenshot above shows, his views are a very small percentage of his subscribers. You can make up some of that with volume, but it still doesn't seem like he's generating a lot of income via YouTube.
He has convinced himself that he cannot be an activist if he isn't a "professional" one, by which he means that his activism work generates enough income for him --and his family, and Tibor-- to live comfortably. Many activists (most, would be my guess) do this kind of work with little or no remuneration, and have to work or find financial support elsewhere. His activism is only possible if it is convenient to him. If it was important to him, he could do his videos and other content with even less than he receives now.