@kaia Channels like Kurzgesagt make more money from selling merch than from ads. You're good with stable diffusion, so it could be a long term opportunity.
Another source is sponsorship. A choice between shilling a VPN service, some investment thing like Masterworks, or physical products like headphones and makeup products.
If you're going with just ads, it's better to have content about finance or AI cause those will have the highest CPI.