Many sites (like YouTube) are currently in a technical arms race with adblockers. If you see a "Violation" message, you may need to completely remove your adblocker, clear your cache, and install a fresh copy of uBlock Origin with default settings.
If a website has blocked you from viewing content because you use an adblocker, you have two main options. The first is actually disabling the blocker. The second is using advanced tools to hide the fact that you have one. how to unblock adblock in chrome
Switch to uBlock Origin (not "AdBlock"). It is lighter, more efficient, and has built-in lists to defeat most adblock detectors automatically without you doing anything. Many sites (like YouTube) are currently in a