YouTube is intensifying its efforts against ad blockers adding a countdown timer. Users must wait 30-60 seconds before they can close the alert and use the site. To avoid this you can allow ads, pay for Youtube Premium or check out our alternative solutions: https://alternativeto.net/news/2023/8/youtube-now-pushes-warning-messages-with-countdown-timer-for-who-use-an-ad-blocker/