OK, I figured it out. I had to click on account and sign out. Then I could sign in with my name. Don't know how this happened, but it's fixed.

Opera links me to somebody else's account on Youtube! I tried rebooting Opera and computer to no avail. No problem on Firefox, just Opera. If I go to Youtube via any search engine on Opera, it links me to someone else's account. I am not linking to Youtube via bookmarks or Stash or speed dial. How to I get my own account on Youtube to show up?