Here is a quick visual guide about changing your Youtube name.
1. Login to your Youtube account, click on profile icon, then click on “Manage your Google Account”.
2. On the left side, click on “Personal info”.
3. Click on your name section.
4. Click on your channel name or edit icon.
Change your Youtube name and click DONE.
The process is similar to Youtube Brand accounts.
But, you can change Youtube name a limited amount of times.