As i guessed, YouTube’s Next Initiative would be doing this(See the linked thread) and they might be actively working on getting this done in the backend… If they managed to do this which is extremely hard to accomplish(tech being Stable), then adblocking on yt would no longer be known as we know it…
If shields is not working, just turn it off, dont use any kind of adblockers and just connect to a Russian VPN server as i said in my Previous response on this thread…