Yes, but as of the last couple months. YouTube and ad blockers have been in a constant cat and mouse game where YouTube blocks users with an AD blocker from viewing content at all, until your ad blocker updates with new rules to circumvent that blocking. Trivial for you and I maybe, but less so for someone the GP described as “elderly”

> He has adblock installed, he disabled it because of the terms of service popup by YouTube.

Yeah if it is updated chrome plugin which Google of course delayed update on.