You will see your list of blocked accounts. Tap Unblock next to the user’s name.
Have a question about a different YouTube privacy setting? Leave a comment below (just don’t block me!). unblock youtube user
Blocking and unblocking should be a tool for your mental health, not a weapon for drama. If you unblock someone who was harassing you, remember that you can always block them again instantly. Conversely, if you accidentally unblock a spammer, just go back into the "Blocked users" list and add them again. You will see your list of blocked accounts