Yes, NordVPN can block YouTube ads. NordVPN’s Threat Protection and Threat Protection Pro features work by blocking ads at the network level, including most types of YouTube ads such as pre-roll, mid-roll, and banner ads. This feature functions by preventing connections to known advertising and tracking domains, which effectively stops many ads from loading on YouTube. In my tests, I didn’t see any ads while browning on YouTube with Threat Protection Pro on.