Don't get me wrong I'm not complaining about them being away, but neither my new Philips 55PUS7272 or my nvidia shield 2017 have shown me any adds in their lifetime. Phillips has been with me since I bought it from black Friday sale, but shield has been with me since the new 2017 pro unit got released.
I don't believe that it is something in my network settings, because apart from wlan settings they are pretty much In the factory settings. Also when I try out the normal YouTube app in my phone (using my wifi or mobile connection) those adds come through normally. And also if I use my old panasonic tx-l47et5y tv and it's youtube then I get adds as well.
Needless to say that youtube Red subscription is not available in my country, so that can't be the reason either.
yes, YouTube for Android TV has ads. I see them all the time on my Shield.
I started using Youtube Smart TV or whatever it's called. Looks similar but no ads.