This isn't a very good idea in my opinion.
Recording with friends and people you actually know will make for a better recording, trust me.
If you record with a random person you found on the forums, more then likely the call will be emotionless and all and all boring.
Also, I'm guessing your youtube is kind of new, so I'll be the one to let you know that it's better if you record your first 5-10 episodes alone, so you can get to know your viewers more, and they can get to know you.
Good luck with your youtube though and remember to never hurt trees!