Blocking someone on YouTube will stop them from making comments on your videos or Channel, and they won’t be able to contact you through private messages either.
If you feel you’re being bullied or harassed by someone, please see more information on how to protect yourself from Bullying and Harassment.
Here’s how to block someone on YouTube
- Visit their Channel page, which should have a URL similar to www.youtube.com/user/NAME
- On their “About” tab, click the flag icon
- Click Block User
Users you block on other Google products will also be unable to comment on your videos and send you messages.