Only Exclusives eaen you credits. Youtube playlists earn you zilch. It's pretty obvious when you have an unread message.
You can actually claim bounties with YouTube videos though if you were to post when an achievement/trophy pops up in the window. That isn't exclusive to Game Anyone videos as I once thought as Mace told me, but you only get the credits from that if no one else has ever done a video and claimed that achievement/trophy's bounty.
Weird I never get that message where does it usually show up?
As Duke said, you'll get one for completing an LP once it had been backed up, and only if it was an exclusive one for this site. If it's a YouTube playlist all you'll get is EXP for your profile.