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

YouTubeManagers 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.
For more instructions about adding admins and managers to social media accounts, please visit the Full Serve blog post on that topic: Adding Managers to Social Media Accounts.