Greasy Fork is available in English.
Hide videos of blacklisted users/channels and comments
< Feedback on Block Youtube Users
This script doesn't work for me either, and I've written about it here before, but there's no response from the author of the script. At first, the red x did not work anymore to add users to the ignore list of this script. Then I added the users manually, but that hasn't worked for a while either. I will now try an older version as I am using YouTube Redux which forces the old user interface of YouTube.
This script no longer works. I can no longer block users.