Changing YouTube Email address

I'm currently trying to figure out a way to change the email address that is linked to my YouTube account. every source that I found has said that I need to transfer my email to some sort of Brand Account. I have done that and now I am waiting 7 Days in order to make the new email address the owner of my current YouTube account. However, I I'm worried that all of my playlists on YouTube music, My liked videos on YouTube, and my subscribed to channels on YouTube will get removed after I make the new email address the owner. will this happen or once I transferred to a new owner will everything transfer over to that including my YouTube music?