You seem to suggest that you have a device which does not allow you to watch YouTube videos on it without ads. Is that the case?
The uBlock Origin browser extension removes all YouTube ads. It works fine on Firefox, even on mobile. With Chrome, it is possible to use the "lite" version of this extension that seems to block at least the YouTube ads without issue.
On Android, there are several apps which can do it, for example NewPipe or Grayjay. At least NewPipe works fine on Android TVs as well. Also on Android TVs, it is possible to use Kodi with YouTube and InputStream Adaptive add-ons which can also be used to watch YouTube without ads.
I would avoid buying devices which claim to support YouTube but do not allow watching it without ads, for whatever reason.