To increase YouTube ad revenue, make videos over 8 minutes to unlock mid-roll ads (can double revenue per video), enable all ad formats including non-skippable (2–3× higher CPM), and improve retention so viewers actually watch those ads. Keep content advertiser-friendly to maximize RPM. Check YouTube Studio to identify your highest-earning topics and double down. Publish more in Q4 when CPMs spike 50–200%. Diversify beyond AdSense. Sponsorships, channel memberships, affiliate marketing, and Super Chats often pay 5–10× more per fan than ads alone.