Come-on; Smart DPN works correctly. Answer was already provided by "ryanmcrypto Nov 20, 2021".
Your browser cannot use secure DNS to query DNS servers. That's all. By default both Edge and Chrome have forced Secure DNS query enabled (man in the middle attack). To turn off it:
Edge:
Settings > Privacy, Search and services > Use secure DNS to specify how to lookup the network address for websites (Disable)
Chrome:
Settings > Privacy and Security > Security > Use secure DNS (Disable)
Also after disabling blocking add's in Youtube will start to work.