How to add an administrator to a YouTube brand account?

To add an administrator to a brand account on YouTube, follow these steps:

1. Go to Google Brand Accounts.
2. Select the desired brand account from the list.
3. Click "Manage permissions".
4. In the top right corner, click the "Invite new users" button.
5. Enter the email address of the user you want to add.
6. Select the role "Administrator".
7. Click "Invite".

The invited user will receive an email notification and must accept the invitation to become an administrator of your brand account.