If you’ve vowed to never use YouTube again, you may be happy to know that if you had a previous username on YouTube, you can go back to using it. This means that you will not need a Google+ account in order to comment on YouTube. In fact, you can even delete your Google+ account if you don’t like. This tutorial will show you how to disconnect Google+ from your YouTube account and go back to using your previous username.
- Sign into your YouTube account and click on the arrow next to your picture at the top right corner of the page, to display the YouTube menu. 
- Click on “YouTube settings” in the menu that pops down. 
- Underneath your email address and next to your picture (on the Overview tab), click on “return name to (your username here), and disconnect Google+ profile.” 
- On the next page click on “OK.” Here’s what will happen once you complete this process: 
The name of your YouTube channel will be whatever your old username was. For instance, mine would be “chachafance” instead of “Charnita Fance.” Your Google+ profile will still exist with real your name on it, but you can delete it if you don’t like. If you choose to keep Google+ profile, it will no longer be connected to your YouTube account. You won’t have to worry about a your comments and the videos you comment on automatically being posted to your Google+ profile.
Unfortunately, this will not get you the old commenting system back, but it will help you get rid of an unwanted Google+ account that you may have created just so that you can comment on YouTube. Also, you won’t have to use your real name anymore. Note: I am unaware if this will work for those who do not have a previous YouTube username, since that seems to be the only fallback option. I’m also not 100% sure if you can go back to using your Google+ name in the future, but seeing as Google really wants the two to work together, I don’t see why this wouldn’t be possible.