Adblock plus was the standard for so long until maybe 5 or so years ago when they were bought out or something and they were hinting at letting some ads in. I think only the very online people switched to uBlock Origin before Adblock Plus tanked itself. That is all from hazy memory but it wouldn’t surprise me that normies got recommended Adblock Plus and used it until it didn’t work right only to seek out better options now that youtube is serving them so many ads.