YouTube is tweaking the way it chooses which videos will have adverts shown with them.
The update comes after YouTube made changes to the way videos were monetised, to stop ads appearing alongside extremist content.
The changes prompted complaints from some popular vloggers, saying it made it hard for them to earn money.
The improved algorithm should mean more videos were classified as suitable for ads, YouTube said.
YouTube is doing whatever they can to avoid paying content creators a lot money.