Same, and I watch a lot of Youtube. I've never even seen the warning yet. My theory so far is that it's because I'm on Linux and they're guessing Linux-users tend to do whatever they can to avoid watching ads anyway so we're not included in their testing (yet).

That being said I do get quite some ads on Twitch(and I know there's solutions to this, but they're separate from uBlock origin and I have to keep updating them cause they keep breaking so I stop caring sometimes). The way I solve it there is to just have 2 different streams open in 2 different tabs, one of them muted, as soon as ads start I switch to the different stream.