I watch a lot of what I would call "blue-collar" YouTubers. Woodworkers, machinists, makers, electrical hobbyists, etc. When they talk about their income, all of them say that their Youtube ad revenue pays next to nothing. Some of them make a decent living via Patreon or have other ways that for their followers to support them (e.g., selling project plans).

I can say with 100% confidence that none of them went to film school.