What? YouTube app can be filtered by AdGuard for android, with latest version 12.34.55 i see ads with adguard actived, but why i see ads? This program is made for deleted ads. As I already told you, you go in setting>Apps>Scroll down until see Youtube app and open it>i click on deactivates button>restart your device. Next go to store and disable autoupdate after you search youtube app!It varies from device to device . I personally don't recommend turning off updates for apps or downgrading apps due to security.
It's likely the YouTube app can't be filtered by AdGuard for Android anymore.