Funny story... got a new computer, so had to log in to youtube, however, having not done so for a long time, I couldn't remember the email address I used for it. Going through the "forgotten email" part, they ask me to put in my username, so I threw in Dunnykin, and the next page gave me Dunnykin@googlemail.com, so I figured that's what it is.
I go through the "forgotten password" part, throw in my regular email address as an alternate contact, and go to answert the secret question. That turns out to be "Dick Dastardly and..." and I think that seems far too easy, but I have had it a long time, I guess I made it during a simpler time...
Long story short, I now have access to someone else's email address...