On Android TV there is SmartTube for example. I am not sure if adguard is doing something as well. But i am still 100% adfree on YouTube.

I know it's extra cost but buying Nvidia Shield TV Pro made things so much easier. SmartTubeNext works great on Android and you can control it through your phone (Revanced).

I bought LG OLED TV and WebOS had been utter piece of shit so far. Disconnected it from the internet as soon as I got the Shield (I can also use Shield's remote to control the TV itself)

A bit off topic, but I was interested in Nvidia Shield but I have an (5.1) amplifier hooked on my TV with Optical Cable. As I understood, Shield doesn't have any Optical out. Is it possible to connect Shield to TV and let TV (LG with WebOS) pass audio through optical to the amplifier?

My amplifier is quite old, so it doesn't have HDMI in or something.

This is what I'm using, Shield => HDMI => TV => Optical => Soundbar. There are some settings on the TV to enable external speakers over optical, which format is sent (Dolby Digital, etc), and which format is accepted (bitstream) that you may need set. The Shield also has settings for which signal is sends. Works well for me after configuring it and I get Dolby Digital 5.1 (ac3 5.1) from my Shield to my LG C2 to my soundbar over optical.

I have regular entry level 2.1 soundbar connected to the TV with optical as well and I use same setup you described. No issues observed

Great, thanks!