Tap Your data in YouTube (this is where Google hides advanced settings).
So, how do you undo it?
That’s it! They are now free to comment on your channel again. The mobile app is slightly different because the "Settings" menu is hidden behind your profile. unblock youtube user
From the dropdown menu, select Settings . Tap Your data in YouTube (this is where
Open the YouTube app and tap your Profile Picture in the bottom-right corner. tap Hidden users (or "Blocked users").
Click on your Profile Picture in the top-right corner.
Under the "Privacy" section, tap Hidden users (or "Blocked users").