For the username, put something you can remember. You need to remember the username in order to log in back into the fake account.
Create a password and fill in the gender, birthday, and mobile phone number. These can be fake, but make sure to register a Youtube account over 18 years old!
Provide an e-mail address, fill in the CAPTCHA, agree to the Terms of Service, and click Next Step.
Add a profile picture to make things more authentic.
Go to http://youtube.com and sign in with the Google Plus account you just created. Go to the desired video and click “Add a channel” and go to the next step.
Put your comment, and people will think that you’re a famous person