YouTube not being blocked

I setup NextDNS for the first time this morning, intending to block YouTube on my network.  I have added it to Parental Control, linked my IP, and entered the 2 DNS servers in my router settings.  When I tested it this morning, everything seemed to be working and I was unable to access YouTube on my PC.

My son got home from school a few minutes ago and I heard YouTube coming from the basement. I went downstairs and sure enough, he was watching videos. When I check the logs, it actually shows www.youtube.com and accounts.youtube.com being blocked repeatedly, but somehow YouTube is still working anyway. What am I missing?