To combat the use of ad-blockers and increase revenue for both the company and creators, YouTube is testing a feature where a popup appears to select users, prompting them to subscribe to YouTube Premium instead of using an ad-blocker.
YouTube ad blocker: While it is crucial for Google to run ads to generate some revenue, it gets a little annoying when you get 4-5 ads in (popular) lengthy YouTube videos. Here's how you can block ads on YouTube for free.