You can monetize a YouTube downloader website through various methods. Ad networks like PropellerAds or Adsterra work well for such sites. CPA networks can help you earn when users complete specific actions like app downloads. You can also use affiliate marketing by promoting tools or services related to video editing or downloading. Subscription plans for premium features can generate income. Ensure your site complies with copyright and legal guidelines to avoid issues. Testing multiple monetization methods will help you find the most effective one. Regular optimization of your strategies will boost your overall earnings from the website.