I use Signtunes with uYouPlusExtra (on GitHub). This does not require a computer, but will cost you 10-15$ yearly to sideload without a computer. But Apple will allow sideloading SoonTM, so it might become free.
uYouPlus is no longer being actively developed, uYouPlusExtra is a fork under active development.
I came across this website thanks to someone sharing it here, so I thought I’d do the same: https://fmhy.pages.dev/storage/#youtube-frontends
And for iOS I can recommend uYouPlus (https://github.com/qnblackcat/uYouPlus). The cheapest way to sideload it is using AltStore. But there are other services which offer sideloading on device, these don’t require a computer.
Also perfectly fine, I just prefer the features the uYouPlus app offers. It’s not only ad blocking, but also sponsor blocking, pop out player, background playback, reordering tabs (so I can remove the annoying shorts tab), and a bunch more.