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YouTube warns it might make your viewing experience worse if you don't turn off your ad-blocker
(www.businessinsider.com)
This is a most excellent place for technology news and articles.
I remember the first time I saw ads on YouTube, I had just set up a new computer and wanted to test everything. So I opened Firefox and loaded a YouTube video. I got a preroll and wondered "wait ad's, on YouTube?" Then I realized I had been using AdBlock for so long I never witnessed the transition from ad free YouTube to YouTube with ads.
These days I use unlock origin, Sponsorblock and revanced. For now it still works but maybe I'll leave YouTube soon :/