something works, because I don't get ads on my desktop browser at home (firefox + uBlock Origin + Privacy Badger + PiHole) but I do see them when I'm away from home on the app on my tablet.

OK, because ppl are gonna ask, I checked: I'm not seeing ads in the app on my tablet at home, so its the PiHole cutting ads. Ooops, I'm not seeing ads on my desktop when using my smartphone as a hotspot either (no PiHole), so Firefox + uBO + PB also blocks YT ads.