At the top of your screen, click your profile picture.
Please make sure you are signed in to the account of the channel that you want to move.
Click Create a channel.
Create a brand account.
Navigate to Settings > Advancedsettings > Movechannel to a Brand Account.
As the brand account is still associated to the same account, you will be requested to replace the brand account, you need to be careful here and make sure that you are moving the right account.
Click Replace, then select Deletechannel in the box that pops up.
Review how your channel name will appear after moving, then click Move channel, this will delete the newly created brand account replacing it with the account you want to move.
Provide account access to manage the channel:
On YouTube, sign in as the owner of the brand Account.
In the top right, click your Profile picture >Settings.
Under Account select Add or remove manager(s).
Click Managepermissions.
Choose Invite new users.
Enter the email address of the Google Account you would like to move your channel to.
Below their name, select a role, in this case pick Owner.
Select Invite > Done.
Accept the email invite sent to the newly added Google Account.
After seven days, sign in from the new Google Account and return to ManagePermissions.
From the down arrow, change the role of the signed-in account to primary owner.