I signed in with a YouTube username
If you created your channel before May 2009, and haven't been signed in since 2011, your channel isn't using a Google Account. These types of accounts are called "legacy YouTube channels."
To access a legacy channel, you need to link it to a Google Account. Here's how:
- Go to https://accounts.google.com/Login and sign in to the Google Account you'd like to link with your YouTube channel. If you don't have a Google Account, you can create a new one.
- Go to www.youtube.com/gaia_link.
- In the box on the left, enter your YouTube username and password. If you don’t remember your password, unfortunately there is no password recovery option for these accounts.
- Select Link these accounts.
- Select Claim channel.
After you complete these steps, go to YouTube and use your new Google Account username and password to access your YouTube channel.