User | Unblock Youtube
Look for the tab that says Blocked users (sometimes labeled "Hidden users").
You will see your list of blocked accounts. Tap Unblock next to the user’s name. unblock youtube user
From the dropdown menu, select Settings . Look for the tab that says Blocked users
You will see a list of everyone you have blocked. Find the person you want to unblock. tap Hidden users (or "Blocked users").
You don’t need their approval, and they’ll never know you did it. Have a question about a different YouTube privacy setting? Leave a comment below (just don’t block me!).
Under the "Privacy" section, tap Hidden users (or "Blocked users").