: If you find you still can't see content from a specific channel despite unblocking them, you may have accidentally selected "Don't recommend channel" on your homepage. You can reset these preferences in your Google My Activity settings under "Other Google activity". Google Help Are you looking to unblock someone so they can comment on your videos , or are you trying to see a channel's videos that you accidentally hid?
You cannot unblock yourself from someone else’s list. If a user blocked you , you cannot comment on their channel or see their community posts. The only way to reverse this is to contact that user via a different method (Twitter, email, etc.) and ask them to unblock you. how to unblock users on youtube
If you blocked someone from commenting on your personal account or via your Google account: : If you find you still can't see