I’ve been scratching my head around this for the past 3 months, with a solution at last!!
I don’t want to lose my channel username and my videos and views etc. But Youtube has no way to change your username or your email address so your email address is stuck with your username. Or is it??
There is a tool I happen to come across called migration. It allows you to move data between google accounts. It’s very undocumented and hidden, but it works like a charm.
So I have a channel called www.youtube.com/hisvine which is linked to the webmaster email address for that domain (webmaster at hisvine dot com) however I want it to be linked to youtube at hisvine dot com so that another person can upload videos without having to use the administrator account.
So here is how to do it.
Go to https://accounts.google.com and login to your account
Then once you are logged in, go to the migration tool and swap in the email addresses that you want to use as your source and destination
https://www.google.com/dashboard/migration/?srcAccount=webmaster@hisvine.com&dstAccount=youtube@hisvine.com
Sign in to the second account and select the google products you want to move between accounts, in my case YouTube and your done 🙂
Hope that helps out with a lot of people that are having that issue
Please leave a comment if this helped you out