Here are instructions for how to transfer ownership of your YouTube channel to a different Google+ account.
3 Steps to Transfer Ownership of a YouTube Channel
1. Make the new owner a manager of the YouTube channel.
Make sure you are signed in with the Google account that is the current owner of the YouTube Channel and then go to YouTube (watch the top right of the screen to make sure you are still using the correct account). Then add a manager in the account settings for the channel. Step by step instructions at support.google.com.
2. Wait One Day
Managers need to be listed for at least one day before ownership can be transferred to them.
3. Transfer Ownership in Account Settings
Go to Managers in Account Settings and transfer ownership. Step by step instructions at support.google.com.