I only watch YouTube on my PC because trying to watch YouTube videos on my Android phone is infuriating. Not only the many ads but also the mutation they call a user interface on their phone version. No ads on my PC because of FireFox and the AdBlock Plus addon. I also download many videos using 4KDownloader if I think I ever want to watch them again, such as my favourite music videos.
If on the rare occasion I want to watch YouTube videos on my TV or home theatre, I just use my PC as the internet connection and local area Wi-Fi to connect to the TV or projector, no ads.