Haven't seen this yet for my browser configuration, I know it has only hit a random saple of users worldwide, but I'll make a few points:
Many of the channels on youtube don't make their money from google's inserted adverts any more, but from having product placement and internal adverts. Each video usually says at the start "sponsored by...", shoves links to ...'s website in the description, has a ... long piece at the video's end, and maybe inserts a ... advert in their own voice and visual style in to the video at a semi-convenient point in the middle.
Yes, these product placement ads can be annoying, but they aren't so bad. They are paying for the free videos, and they are inserted at timestamps where the channel's creator doesn't think they'll be too disruptive, they don't cut words in half.
With this in mind youtube's own inserted adverts are probably making money for youtube-google rather than for the person/organisation who actually made the video (who makes much more from product placement / internal adverts), and they get inserted at terrible times. If you have a video on in the background, a lecture or history documentary, whilst you're doing something you do not want to be having the volume suddenly jump in the middle of a sentence to bombard you with marketing for a product you know you'll never want (especially now you've seen how awful and disruptive an advert the seller is willing to create for it).
And that's before we get to the security aspect, yes I run Linux so am relatively safe from viruses, but the number of cases of malware exploits being packaged in to adverts, which get bought up by an ad network, which resells to another ad network, and so on until mal-adverts appear on the very most prominent of websites, are such that going online without an ad blocker is like running naked through a thorn hedge.